Marriage

If Talaq with all Islamic conditions was not done, the first Nikah remains valid. If proper Talaq has been done, then second Nikah will be must. No need for Iddah after the Talaq if Nikah is with the same person.

Wassalam.

There is no evidence what so ever that the Prophet himself allowed such marriage. Both of the ladies were divorcees of two sons of Abu Lahab, the enemy-uncle of the Prophet (SAWA). After their divorce, they were free to marry whom so ever they wanted from Muslims. In fact, the real daughter of the Prophet Muhammad (SAWA) was Fatima (AS) and he marriage was by order of Allah (SWT). It is mentioned in Sunni books that when Ruqayyah passed away, the Prophet (SAWA) did not allow Othman to attend her funeral.

Wassalam.

Aisha was a mature woman and not a child as some people claim when she got married with Prophet (SAWA). What is famous among our Sunni brothers according to some of their books, that she was seven or nine years old girl. This is among many famous things which have no authentic evidence as it said in Arabic رُبَّ مشهور لا أصلَ له

They wanted to create a virtue for Aisha by claiming that she was very young when she got married to the Prophet (SAWA). This claim of her very young age contradicts with facts mentioned in their own Sunni books which mentioned the age of her sister Asmaa' Bint Abi Bakr who was ten years older than her.

First fact: Asmaa' Bint Abi Bakr was born 27 years before the Bi'thah of the Prophet (The start of Islam). This fact has been mentioned in many prominent Sunni books like:

Mo'jam Al-Zawaa'id , v.9, p.260.

Omdatol Qaari, 2:93.

al-Mo'jam Al-Kabeer by al-Tabaraani , 24:77.

Tareekh Dimishq by Ibn Asaakir 69:9.

Tahtheeb Al-Asmaa',2:593

Osd Al-Ghaabah, 5:392.

al-Isaabah , 8:14.

Second fact: Aisha was ten years younger than her sister Asmaa'. This fact has been mentioned in many Sunni books like : 

al-Estee'aab 2:616

al-Sunan Al-Khubra by Al-Bayhaqi 6:204

Siyar A'laam Al-Nubalaa' 2:295

Tahtheeb Al-Tahtheeb 2:398

Tareekh Al-Islam by al-Thahabi 5:354

al-Bidayah wal Nihayah 8:381
Osd Al-Ghaabah 5:392

These two facts lead to the fact of the age of Aisha. She was born seventeen years before the Bi'thah. The Prophet remained in Makkah for 13 years the migrated to Madinah. This means that Aisha was thirty years old when the prophet migrated to Madina. The marriage took place two years after migration which means that Aisha was thirty two years old when the marriage was consummated.

Many Sunni scholars have rejected the narrations in their own books about the small age of Aisha despite being narrated in Bukhari book. 
Many enemies of Islam have attacked the Prophet because of the claimed very young age of Aisha which is claimed by some Muslims.

'We have authentic evidence as you can read above that Aisha was never a child, but was over thirty years.

Wassalam.

There are supplication which are mentioned in our books, but many of our Ulama mentioned that reciting these Sura and Quranic supplication help a lot in marriage; RABBI LAA TATHARNI FARDAN WA ANTARCTIC KHAIRUL WARITHEEN رب لا تذرني فردا وأنت خير الوارثين 

Also: INNAHAATHA LARIZQUNA MAA LAHU MIN NAFAAD إن هذا لرزقنا ٬ ما له من نفاد 

Performing Night Prayer also is very helpful in getting your wishes.

'Wassalam.

1. There is no evidence that your marriage was blocked by black magic and you should never surrender to this claim. Those who think that they are under the effect if black magic, get harmed even if there is nothing done against them, but they themselves harm themselves by thinking that they been under back magic.Even if there is any possibility of bad thing done against you, you can easily remove it away just by reciting Ayatul Kursi, Sura Falaq and Sura Naas after Prayers.

2. Reply on Allah's Mercy and trust that He will never let you alone. Seek His help always and supplicate and seek His support.

3. Recite this verse as many times as you can especially after every Prayer: إنَّ هذا لَرِقُنا ما لَهُ مِن نَفاد INNA HAATHA LARIZQUNA MAALAHO MIN NAFAAD (Sura 38, verse 54). This verse has great benefits in many matters including marriage.

4. Recite this Quranic Du'a : ربِّ لا تَذَرني فَرداً وَأنتَ خَيرُ الوارثين RABBI LA THATHARNI FARDAN  WA ANTA KHAIRUL WARITHEEN. (Sura al-Anbiyaa', verse 89).

5. Repeat Salawaat (ALLAHUMMA SALLI'ALA MUHAMMAD WA AALI MUHAMMAD) and Istighfaar (ASTAGHFIRULLAH RABBI WA ATOOBU ELAYH) and (La Hawla wala Qowwata illa Billah).

Wassalam.