@Mummyshark92 that must be terribly hard. I am so sorry you are in this situation.
I hope someone else will come along with better advice but in the meantime I think you should speak to your health visitor. You should have one even if you have not met her (or him yet) or perhaps your midwife.
Tell them the situation and ask who to talk to.
I'm an adopter with a birth child of 14 and an adopted child of 8. So I have not been through the process but my best estimation is they will work with you to see what is best.
The situation is very complicated.
You may still be the best person for your bsby but with added support. If you really feel you cannot cope someone else will be there to parent your baby and you can perhaps navigate things in a way that is kindest to you all.
If you already know the father has no home to take the baby to then you know it's unlikely he'd be able to take the child. He has had months to think about this and if he was serious about taking care of the baby, presumably, he would have found a place to live. What does he think is going to happen when baby is born?
Would you expect him to be able to care for the baby if he has a home? If not, you do need to explore what would be best for baby.
I cannot imagine how hard this is for you.
I'm not going to try to talk you into keeping the baby, except to say please be open to that as a possibility and don't allow others in the family to control you.
Think, maybe, about what would need to change for you to feel able to keep the baby? And if not what you would want to happen?
Wouod you need...
Support?
Finances?
Mental health care?
It will help you to know what you need and what may be possible even if you still decide to relinquish baby for adoption.
If you cannot care for baby initially then foster carer/s will be needed. I've no idea how tgis all works if your ex opposes adoption. But right now you need to start talking to professionals so they know you are in a very difficult position, baby's dad doesn't seem able to assist in a realistic way (where is he living?) And you already have two children.
Please talk to professionals, be open minded and VERY kind to yourself.
Xxxxx