Pregnancy symptoms but negative hpt

Hi ladies! My last period was mid December, I was spotting once a day (in the morning) for 2 days and haven't bled since. I've had pregnancy symptoms and have taken many hpt but we're all negative. I've had PCOS for about 10 years now and the dr more recently out me on spironolactone and metformin along with birth control. I haven't taken birth control since October. I've seen some posts saying some people have had false negatives until they were 7 weeks pregnant, 10 weeks pregnant, etc. I went to the dr last week and they did another urine test but that came out negative as well. I'm still having cramps but no period and my pelvic muscles feel sore. I don't want to give up hope, but I also don't know what to do. Is there any advise you ladies have for me? TIA