EhveesMom, my little one is 13 months and here are my thoughts...
After my son was born, my body was a bit worn out. It was a relatively easy pregnancy (besides morning sickness, then vomiting up to ~24 weeks) and super fast birth, but pregnancy really sucks a lot out of you. For some, it is more draining than for others. I would sometimes in the first few months postpartum get a bit dizzy or just feel drained (not tired, just drained of energy, if that makes sense).
Also, I gained quite a lot of weight during pregnancy, and I will admit that I wanted to regain my body.

So, I understand what you're saying.
As soon as I felt more comfortable with my body and MORE IMPORTANTLY like I could get through another pregnancy without feeling drained, I started to entertain the idea of TTC #2.
I really want the children to be close in age, too, so that made me decide I was ready. I have a friend whose children are 15 months apart. While I have no question that she can do it, I don't think I could. My son is pretty easy, but he does require a lot of mommy time. Somewhere around 2 years seemed more doable for me. But everyone is different.

So if I were you, I would ask myself:
What age gap do you think you personally could do?
Is your body ready to go through pregnancy again?