Cramping at 9 weeks similar to period cramps.. is this normal?

This is my 4th pregnancy and I’m 9 weeks today. I’m also 6 months postpartum from having my last baby (c section) if that makes a difference. For the last couple of days especially at night my pelvic area feels kinda sore and heavy and I’ve been cramping on and off kinda similar to period cramps. Is this normal ?? I do have low progesterone but have been taking 400mg of progesterone orally every day since 6 weeks. My doctor only took my blood one time at 7 weeks to see if it was going up or not with the medication and it was still very very low (only 7.8ml when it’s supposed to be between 12-20ml) but they didn’t take my blood again after that so not sure what my level is now or if it’s rising like it should.. I’ve had a miscarriage before due to low progesterone and have dealt with this particular issue in 3 of my 4 pregnancies in a row now so every little thing worries me..😅