No, a scan will not affect your periods
. What I would suggest, is, call your doc, and
request Prometrium for 5 days. That will induce a period if you are not pregnant, and won't do anything at all if you are. If you do have a period, I would suggest taking Femara 5mg daily for 5 days starting on the 3rd day. That will induce ovulation. I would then do the progesterone test ( or 21 day ovulation test ) on that cycle. You'll get more bang for your buck.