Thyroid may be the cause

Danielle
Hello ladies I have had to miscarriages this year. We'll first one was a mc but other was a belighted ovulm but ended in a D and C. Went today I had some test done a few weeks ago, to see what could be the reason I was able to get pregnant but unable to keep it. All my test came back ok except my thyroid and also somwthing else thst may have to do with mutation but dr said he wouldn't worry about that. He is sending me to a dr to check my thyroid, and told me to take a baby aspirin whwn my husband and I would try again. Has anyone else been though this before and what coukd a baby aspirin do to stop another pregnancy from going wrong. I just want everything to go good this time because losing to babies is enough