15, First time Nuvaring and Condoms Questions! 😁

So I'm 15 and just had my first time on Sunday, I am on the Nuvaring and when my boyfriend and I did have sex we used condoms as well. I definitely don't want to be getting pregnant hence the reason I didn't want to do anything till I was on BC AND we had condoms. It was great and afterwords we filled the condom up with water to make sure there weren't any holes. But ever since we've done it I've been getting cramps and nausea. Though in pretty prone to getting nausea I don't know if it's just the usual, or a mentioned side affect of the Nuvaring. I think I'm just paranoid. Is any of this strange? The sex wasn't painful, nor did I bleed after. But for the past couple of days I've been paranoid about possibly being pregnant. I think it's HIGHLY unlikely because we were pretty safe,but are there any symptoms I should watch out for? For now I'm just praying I'll get my period when I remove my ring because it's the first month I've been on it so I'm not entirely sure about how my period will react with it. I don't know I'm just worried about everything.