Pinching in my lower abdominal area, and flutter. Did you feel this before you found out you were pregnant?

I have a son already, he is 18 months. We're trying for number two (just this month) and I did not feel like this with him. I am wondering if it has anything to do with the fact I had c section before. I am having a weird tight feeling and pinching at times with a couple flutters like a muscle spasm. It's almost like how you can feel the baby move for the first time. I know it couldn't be that, not yet anyway, but was wondering if anyone had the same symptoms and ended up becoming pregnant? My window for ovulation was the 9th thru the 13th. Thank you!