Help???

I had sex once this cycle. We used a condom from beginning to end and after that, we checked if it was broken/leaking it was completely dry. The whole condom (outside) was dry. Am I safe?

Just yesterday (19) i had dull cramps and my boobs started to hurt. My boobs usually hurt when I ovulate up until my period so I'm guessing I ovulated late?

My period was 9 days late last month.

Am I safe? Should I not worry?