Hello & thanks for [posting on HCM
pills cause increased uetrine contractions to help pass out products of pregnancy
& hence you are getting stomach cramps
Also lower back can get painful during this time
Usually after taking abortion pills - heavy period like bleeding starts in 24-48 hours & continues for 4-5 days tailing off towards the end - it will all depend on the stage of pregnancy when you were prescribed these pills.
IF suppose your bleeding stops it is worthwhile to get USS doen to make sure that products of conception are not retained inside
Hoping you to have a speedy recovery