What do I do?

Some backstory. I have 2 kids with my SO, a boy who just turned 2 and a 7 month old. So I had my daughter in Oct and in Feb I found out I was pregnant again, I ended up having an early miscarriage. Now my period is late again and Im pretty sure I am pregnant again.

The problem is my SO has been firm on not wanting anymore kids. Well actually he keeps changing his mind, one day he wants another in 2 years. The next day he just doesnt want any at all. Its so irritating. He has another child, from a previous relationship and our 2 so 3 total. I have 2 and I have told him I want more. His reasoning for not wanting more is because he cant pay for them. Stupid lame ass excuse if you ask me, but whatever, so here I am possibly pregnant again because he refuses to pull out or buy condoms. And he wants me to get an abortion. Im tired of having to be the responsible one when it takes 2. Im against birth control I just dnt like it, dont trust it, nothing. So he says I should get my tubes tied.... when he is the one who doesnt want anymore kids. Im not tying shit. He can get a vasectomy since he thinks he is too broke to deal with more. My parents raised 5 kids just fine so yeh. I just dont know what to do. I want more he doesnt, should I just break up with him? I will be 27 soon and I want to have more kids before 30.

Edit*** so shouldnt he be responsible and get a vasectomy?? I mean he says he cant afford more kids, cool. Get a vasectomy is what I say.