Negative Pregnancy Tests-Help

My husband and I had our first IUI done with 2.5mg of ferma on May 19th, 2015. We had a positive pregnancy test on June 5th (day 34 of cycle). Unfortunately, that pregnancy ended in a natural miscarriage on July 16th. I got my first period after the miscarriage on August 16th. I got my second period on September 16th. We started ferma again on the 18th of September. We had a follicle 17.8mm and my doctor did a trigger shot on the 31st of September. We had our 2nd IUI on he 1st of October and started progesterone suppositories that night as instructed. It is now day 32 of my cycle and I have missed my period (usually very regular). AF was due on the 16th and still no signs of AF. I have taken several pregnancy tests and they have all been negative. My doctor wants me to wait until day 35 to test. I am getting so impatient. Do you think I am out this month or is it possible to still be pregnant? I am worried that the progesterone is delaying my period. Have any of you had NEGATIVES past day 32 and had positive pregnancy tests later? Thoughts and advice will be greatly appreciated.