Could I be pregnant or is it too early too tell ?

Breana

I'm sorry its going to be a little long In 2015 I found out I had Blood clots on my lungs(pulmonary embolism) because of the birth control (Depo shot) I was taking prior to this . I never knew this could happen but anyway while I was being hospitalized for them 2 weeks AF decided to show didnt stay long when I got out of the hospital AF showed up (,I think it was AF at least) from Valentines day to July and I went to doctor after doctor even went to the emergency room and finally it just stopped . . . I couldn't been more happy , So fast forward to last year I find out I have PCOS so I been wondering while I haven't been getting pregnant ( Me and my Bf are TTC) so I started taking the steps to take to try and get rid of the cyst by taking metformin 1000 ( I didnt feel like it was working) I can't get on birth control because I'm going go bleed to death or my blood going to clot. I finally got to see a GYN I told her my story so she prescribed medroxyprogestrene 10 mg (Sorry if I spelled it wrong) and Letrozole 2.5 on days 2-6 of my cycle I haven't even since I took the last pill on 9/6/2017 and I took an ovulation test at 1:36 am the next morning on 9/7/2017 and it Positive ( I think) so I think I ovulated between didn't BD until today so I'm trying to figure out if I can still get pregnant? I haven't taking the letrozole yet .