Nees advice

My period was 3 weeks late and I just got what I assume is my period but I'm in absolute agony I can't sit still, pain killers aren't touching the pain I feel really weak and faint I also have a 15 month old daughter to look after as well it feels like everything is just going to fall out because the cramps are that bad and the bleeding is really heavy I suffered a miscarriage last month and going through tests for polycystic ovaries I've taken tests since my missed period and they've either been negative or have really faint lines one them I don't know what to think or do could this just be my period and its heavy because I was late on or could it be something else 😔