Two Weeks Ago, I Lost My Virginity. I'm On Nuvaring

Two weeks ago, I lost my virginity. I'm on Nuvaring and we used a condom. We have had sex a few times since then, but ever since the first time, I've been bloated, gassy, and have had frequent bowel movements. My abdomen is also getting a little harder than normal and I am unable to suck in my stomach as far as i used to. Help!