Pregnancy Spotting

I am 5 weeks pregnant and been having mild cramping off and on for the past 3 weeks. This morning I had mild cramping and had light spotting on the TP. I am worried that I might be starting to m/c.

Also 3 months ago I had a m/c I was 19 weeks and went in to check the sex of the baby and they couldn’t find a heartbeat and the baby only measured about 16 weeks and they had to enduce labor (it was a girl).

I go next week to get my group B strep test, does anyone know if it is okay to have sex the evening before getting that test or will it affect something with it. My fiance will be getting home the night before my appointment and he has been gone for 6 weeks so I would like for me and him to be able to have sex but I was unsure of whether I could since I am getting this test done. Does anybody know?

I have been having dark spotting it was pink a few days ago now it is dark. I spot during sex and it is not enough to stain or have to worry about a tampon. ANYONE KNOW…i really want to be pregnant but i don’t want to get my hopes up.