Thanks for query on HCM.
Your symptoms are suggestive of pregnancy
Have you history of unprotected sex during fertile period....?
You have to go for urine pregnancy test first after at least 8th missing day.
Sometime it gives late result.,So also confirm it by blood hcg
level and USG.
You can take nsaid
with dicyclomin to subside cramps and headache.
Get examined by gynecologist for further guidance.