Month 4 into trying.... HELP ME OUT by commenting!

I have been trying 4 months, the first month after I had Kyleena taken out... I used ovulation tests... It showed I ovulated, but we didn’t conceive. This month, I was suppose to start on Aug 22nd. I tested the 21st with a first response test and received a negative... I still haven’t started. I have PCOS. I’m not taking anything... Advice? Tips? Tricks? Should I start taking ovulation tests each month? Should I make a dr appt? If the test was negative the day before I was suppose to start could I still be pregnant now? Aug 7-12 was supposed to be my fertile window