I had given back my husband a few months ago his dowry for my freedom he said shukron Jazaakalah, you are free to go so go. I left the next day to go to my sisters house where i had spend 2months and then came down with illness during that time, so the community decided to help, so they house me and place my children under the care of other Muslims until i got better. At that time i was pregnant and almost due to have the baby, he said that he wanted to take the responsibility of the baby and myself to ensure that i was safely delivered. Later he said to me that we are still married cause a khula is not an automatic divorce. Now today the Imam said that we are divorce.So do we have to get remarry to have an aqiqah or will it be harram for us coming together to have the Aqiqah for our newborn baby as divorce parents.


Praise be to Allah

Firstly: 

Khula‘ is not regarded as a divorce (talaaq), but it is an
annulment of the marriage. The wife cannot go back to the husband after
khula‘ except with a new marriage contract. 

One of the differences between annulment and divorce is that
annulment is not counted as a talaaq, so if you go back to your husband now,
he still has the option of three talaaqs. 

But if he has given you one talaaq and your ‘iddah has ended,
if he does a new marriage contract with you, he only has two talaaqs left. 

Any word that is indicative of separation, accompanied by
payment of compensation on the part of the wife, is khula‘. 

If the husband utters words of talaaq along with the khula‘,
such as if he says, “I divorce you on condition that you return the mahr to
me,” this is an annulment of the marriage according to the correct opinion.
In other words, the khula‘ is an annulment even if the husband utters the
word of talaaq at the same time. For more information, please see question
no. 126444

Secondly: 

You can celebrate the child’s birth and do the ‘aqeeqah even
if you are separated, and there is no need to repeat the marriage contract
for that purpose. But it should be noted that he is now a “stranger”
(non-mahram) to you, with all the rulings that implies. 

We advise you to think, pray istikhaarah and examine your
former husband’s situation; if you think that he is good and that there is
some benefit in going back to him, that will be a good time to repeat the
marriage contract. 

And Allah knows best.