No period, only spotting, negative pregnancy test

Okay so let’s start off with the fact that I have PCOS, am 24 years old and TTC. On august 29th when I wiped, the paper had blood on it, very light pink, spotting almost.. so I considered that the start of my period. Days went by after the 29th and no blood at all after that wipe. I was on letrozole so after that “start” of my period I did the treatment as I was supposed to, thinking I was genuinely on my period. My cycles had been regulating so I was confused, still am.. it wasn’t until October 1st where I bled again and it was once again JUST a spot of blood, a dime size of very light pink blood. I took a pregnancy test last night and it was negative.. but I’m confused. I don’t think I should consider this a period, but I’m supposed to start clomid when my cycle arrives and I’m lost if I should start my clomid cycle now with this “period” but then again, same thing happened with the last “period” when I did letrozole and nothing happened at all.. if my period doesn’t come I will need to induce it with provera and I’m pretty sure I won’t ovulate even with the help of clomid due to it just being a withdrawal bleed.. can I ovulate if I have to induce my period with provera? Last time with the letrozole I went to my OB and he said he doesn’t understand why I didn’t get my period but if it doesn’t come by October 7th to take provera and then when my provera cycle starts to start clomid as instructed.. I paid $127 for my provera cause I don’t have insurance and I don’t wanna make any mistakes:( any opinions, facts or similar situations?