Mixed signals.

I tested positive on june 1 and 3. And had all the symptoms of pregnancy: sore boobs, nausea, missed period etc. However I tested again on the 5th (using a different brand of test) and it was negative and now I have some slight bleeding like on and off. I'm not sure if my underlying pcos is causing my hormones to be whacked or am I having a chemical pregnancy/miscarriage. According to the app I'm only supposed to be at week 4 now. I can't decide if the bleeding is implantation bleeding or due to the loss of pregnancy. Also my appt is on the 14th of june, my yearly kkh appt. Was hoping to find out more then. What should I do till then? Help!