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Since you are on Provera
pill, you cannot expect periods to start suddenly at the right time There will be some delay and some irregular bleeding. Pre-ejaculate
is known to be rich in sperm and can also cause pregnancy
. Better to get a Urine Pregnancy Test 10 days after the date of unprotected sexual intercourse, although there is less chance of pregnancy if you would be on the pill as directed by your Doctor. Ultrasound
will not show clear results at this stage, do the Urine pregnancy test only for now. Next time also use a Condom as it can prevent STDs as well.