As expected, nothing came back to indicate any reason for our losses. They ran the gamut of tests, both on myself and DH. We are both chromosomally normal. I do carry one gene for MTHFR, but it isn't the "contributory" one that would cause any weird blood stuff. There was also a autoimmune lab that came back funky, so he did a retest today, but seems to think it was a lab error, as nothing else indicated an autoimmune problem. So, the plan is to forge ahead when we are ready.
ETA: For documentation reasons, he is ruling the first M/C a chemical pregnancy, the second loss a "twin accident", as he thinks something may have happened either cord entanglement or placenta, and the third loss was obviously chromosomal.
Added BONUS: When I asked him if he is concerned about my age (35 in august), he said "What?! You're in my young group. Relax." I am not sure how to feel about any of this, so we'll take it one day at a time. Thanks for all the support yesterday!
*special thanks to Angnshaun for reminding me to update!*