Pregnancy symptoms and bleeding?…

I’m currently 8 months post partum, I’ve been taking my period as normal since my little girl was around 4 months old. Usually my period is heavy and very painful for the first 2 days and lasts 7 days but this time it was light - medium flow and lasted 3 days. I didn’t think anything of it at the time just thought it was an unusual period and got on with it. The last week now I’ve been feeling exactly like I did when I fell pregnant I’ve had frequent urination, nausea and weird vivid dreams. I’ve also been having terrible migraines at least 3-4 per week now and I know that can be a sign of miscarriage having bad migraines / headaches in early pregnancy, just looking for any advice or maybe anyone who’s experienced this sort of thing, I’m going to take a test on Friday just to be sure but my minds doing over time.