TTC- Help having some complications

when I was 6dpo I had a faint like on a 6day sooner first response pregnancy test along with some cheap tests. I went to Dr for a yeast infection and i showed her the image of the test and she said it was positive. so she did blood work and came back negative the only did the simple yes or no. so they did a ultrasound the next day and a few days later they called me saying I have PCOS mind you this is only my primary DR not my Obgyn. I started my period Saturday and it ended Monday about 9 am. we had sex late that night and I started bleeding a little it was a pinkish brown color as if u were to mix the two. it was enough to fill up about half a tampon. we had sex Tuesday night as well but this time it was bright pink and I had a Lil blood clot when I whiped... filled up bout same but I bleed a Lil more.... I have never had this happen before. Normally when my periods done its done. I called my gynecologist and she said to take another test but my bf just gets mad when I mention it. she also told me that she dont think I have pcos. any advice or similar stories.

( ive also taken a few cheap one came out faint also but mind u this was a 6dpo)