So today I had sex as I do quite regularly. My period isn't due for another 13 days according to <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> however part way through we had to stop because my stomach cramped up to the point where I was in tears and couldn't move 😬 it's happened before but never ever this bad 😫 just wondering if anyone could give any advice/explanations on what it could be? Thanks