Why is my side hurting?

Baby

Hey, <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> is pretty accurate on know long when my period comes. Right now <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> says it’s going to start in 10 days and my side is hurting, I think it’s cramps. I had sex yesterday but it was protected (with a condom) and I feel like my stomach is bubbling so I kinda think it’s gas . I don’t know. Can someone tell me