Help! Need opinion!

So September was the first month my husband and I ttc. This might be a dumb question but what is the actual chance that a women has her period during pregnancy? I have read that it is possible and I have read that it's not possible. Well I just had my period for 5 days and it was normal. But i have just felt weird this past week. I've been nauseous on and off, dizzy, extra moody and my breasts are really tender. it's hard to explain but I just feel different. I've never been pregnant before so idk what it's like but I also don't know if it's all in my head because I want to be pregnant. Please no judgement. I just would love to hear if this has happened to anyone. tia