Using progesterone?

Hi ladies, are you using progesterone? I would love your input.

I'm using 100mg pessaries three times a day. I read that progesterone helps avoid spotting. I had spotting with my previous pregnancies that ended in miscarriage. I've been feeling so safe on the progesterone & so relaxed, the only downside is all the discharge. Then this morning I woke up to pink discharge both in my knickers & on the toilet paper.

I'm trying not to stress. Have you experienced spotting whilst on progesterone?

My partner suggested that my vagina or cervix are probably irritated by the tablets. I've had a bit of cramping but I suffer IBS & my morning sickness is giving me diarrhea so at first I thought it was needing to go to the toilet but maybe it wasn't...