How can I get pregnant with PCOS?

So I was wondering if anyone else has had this issue. We have been TTC for 3 months now. I have PCOS and was lucky enough to have my 1year old daughter. Every month I get a few weird symptoms as if to say I may be pregnant. BUT the test always comes negative and my period shows up. Well this month we did it the same way we did when we conceived my daughter back in 2017. I have noticed that my scrubs that fit a week ago no longer fit,my finger nails are growing really fast (only ever had this with my daughters pregnancy) I woke up this morning stiff as a board and have had back pain all day (also had this with my daughter) and I have a cramping in my lower left abdomen. I’m dead sure my period will show up again. Anyone else deal with this?