3rd miscarriage in a year :(

Anyone had clotting factor and chromosomal testing done? I'm currently going through my 3rd mc and I feel so lost.... My dr said next step will be extensive blood work to see if there's anything that will show up. I had my first mc at 7.3 my second at 5.1 and this one at 7.6, I had actually had an ultrasound with strong heartbeat at 6.4. Anyone else have anything similar??