Awkwardness after sex

I just had sex with this guy whom I had sex with 2 years ago and also my first. We broke up before because it was only just sex and he asked me if I was going to abort the baby as I was 2 weeks delayed before. Turned out I wasn't pregnant.

So my boyfriend for 15 months and I broken up couple of weeks ago and this guy just popped out of nowhere and asked for a second chance.

To make the long story short, we tried to had sex last week but we couldn't as he is too big and couldn't fit. Yes. You read it right.

But today, we tried to do it again and failed. After a nap, we tried again. And it happened. It was awesome.

However, I am feeling awkward right now. I do not want to be the girl who gets clingy after a good sex. And I am not quite sure about him now.

I need help. Is this normal to feel awkward after sex? Should I stop this now because I am not sure of if I want this guy back to my life?

Halllppp