Could I possibly be pregnant?

Okay. So this post is probably gonna be all kinds of fucked up. 
But my significant other, now ex, and I had sex on my very first fertile day. He said he didn't cum, because he was on meth. 
However, I had some light cramping yesterday, my last fertile day. 
Could I possibly be pregnant, even though he says he didn't cum in me? And is it shitty of me to kinda want to be pregnant...??? Even though the baby's father and I aren't together and he's a drug addict? I've just wanted to have another baby for a while now. 
Please don't hate. I can't handle that right now. If you can't say something constructive or helpful, please just don't say anything at all.