Hello
Thanks for posting your query at DoctorSpring.com
It is possible that the lining of the uterus gets built up more than normal while on crinone.
IT contains progesterone that supports the fetus in case you conceive, but that also thickens the endometrial lining in case you do not.
So it is possible to have a discharge of the lining of the uterus that looks like clots and blood covered tissues, while stopping Crinone.
Please mention it to your doctor anyways, and see if she / he wishes to do a scan.
All the best
Please feel free to discuss further.