I need advice

A little over a year ago I had my daughter. I’ve exclusively breastfeed her since she was born. I got my period back in June and I’ve been having long and heavy periods. I’d also go longer in between. In September I didn’t have one and October I had one on the 2-10. I was supposed to start nov 4. Ten days late I take two pregnancy tests. They were both positive. Faint but positive. I took 5 more all negative the last one I took was 20 days late. Negative. I’ve heard of false negatives but not false positives. Help. When did you find out you were pregnant?