Why aren’t my pills working?!😫

My period started today, and I always get really bad cramps the first couple of days, so I brought my pills to a five hour D&D game I was attending. These pills:

I started cramping earlier, so I popped some pills, drank some water, yada yada, but a little later I felt bad again. Since it hadn’t been 6 hours I just sat there and played through the cramps. After the game was over, I went home and took two more pills. That was in between 3:30 and 4:00. I’m cramping again. I know the pills work because last period they stopped my cramping instantaneously. I’m really confused. Also, if anyone has an alternative way to stop cramping, I’d love to hear it because obviously these aren’t doing it.

Edit: Thank you everyone who commented, I’ve tried a hot water bottle, since I can’t take baths. Hopefully I’ll feel better if I go swimming.