Need some hope anyone????

So im on my 3rd misscarridge drs dont know why i was on progesterone due to my last misscarridge which was a blighted ovum cause it was super low.i was getting pregnant easy just not developing far. They done blood tests all normal ultrasounds normal i asked if it was a chromosome issue they said it could be but not 3 times in a row. I have 3 kids hubby has one. So anyone that has had reacurrent misscarridges and went on and finally has had a normal healthy pregnancy please someone share some light my way. Thank you.