I'm pregnant and the father wants nothing to do with it

So I'm about 8/9 week pregnant, found out 3 weeks ago after I took a pregnancy test in front of my ex partner (we've since split- no longer talking) his instant reaction was to ask me to have an abortion.

He knew I wasn't taking any contraception yet chose to come inside me anyways after I thought it was safe because of dates of fertility and things (we'd been doing that a lot and never got caught so thought it was a safe method - doing the rythem method).

He's now saying I'm baby trapping him as I've always wanted a baby (he's also always known this and kept changing his mind on whether he wants anymore - he already has a child with his ex who he coparents with 50/50) I'm torn. Being a single mum would be incredibly difficult on my own but I can't help but be excited about being a mum.

To top it off I was made redundant in December so I don't have a job but I recieve some benefits and I have some redundancy money. I have my own house and my own car and my family are really supportive - say they will support me etc- but he doesn't want to be in the child's life and I'm sad. What should I do.

EDIT, I have a termination booked for the 3rd of January. I also told the ex partner that if he wanted a vasectomy when we were together that it would be the end of us and I meant it. He chose to cancel that vasectomy the first time we talked about it so I thought he wanted more children especially with me. This isn't as cut and dry as just simply getting pregnant there's been a lot of stringing me along from his side that I didn't mention.