Cramping 2 -3 days after faint bfp

Jessica • Ttc #3 32 years old
I got a very faint but still visible bfp (7/8dpo).... I was cramping then that's y I tested early lol .....didn't cramp yesterday and now having the same back craps and smaller cramps in front...... I know its early still AF due on Fri ( Monday today) but is this norm? Just worried cuz I have never known so early in my cycle !