I used to get unbearable pain with my periods, I started at 12, and for 2 years I had to have that time off of school.
I was given those M-acid tablets too, they didn't work for me, no pain relief.
I was then put on the pill when I was 14, and I have not yet had any overly painfull periods on it.
Unless you are trying for a baby or for medical reasons cant go on the pill I would try it.