Just lost my rainbow

After seeing a heartbeat twice and watching baby grow on time, I was absolutely devastated this morning when we went in for our third ultrasound and found no heartbeat. Took Cytotec this time so I can just get it over with (never, ever doing that again. So much worse than a natural mc!) I can’t do this again. This is my third in just over a year.

How do I go about getting testing done to rule out potential problems with me or my partner?