period like cramps, but 15 days off until period!

So yesterday morning, I got out of bed and about 10 mins later I was having period like cramps. Immediately I went to the bathroom to check for blood and nope, nothing. Okay, so about 15 mins later the cramps subside and I go the rest of the day without them. Then this morning, same thing! Except this morning, they were worse. Like 2x worse than yesterday! At the time of going to the bathroom earlier this morning, I had more discharge than normal but it wasn't weird smelling, and it was the same texture as always.