How do I know when I’m ovulating since I just my Nexplanon removed on June 11, 2018? I had unprotected sex on June 15 and haven’t been feeling well since. When I got pregnant with my son (my first child), I knew almost instantly that I was pregnant and I kinda feel the same way now. I took a HPT a few days ago and it came back negative. Is my body just adjusting to not being on birth control or could I be pregnant?