I’m so worried

This is the second time I’ve been woken up by I would say “bad cramps” I wouldn’t say severe just really uncomfortable. The first time this happened was the day before yesterday and again not too long ago. I literally ran to the bathroom multiple times in a bending position. This time I actually threw up while I was sat on the toilet. I’m so worried.. I’ve been having cramps off and on for around 5 days now but as I said above I’ve had long lasting ones twice!! That I’ve never experienced before. Yesterday I thought I finally came on as I though it felt like blood came out so I ran to the bathroom and there was nothing. Could this be an early sign? I’m supposed to be due on in 3 days ..