Brown Spotting??

Hi! Little back story, I’ve had 4 miscarriages in the last 3 years, and I’m currently 5+4 and just started taking 200mg of progesterone 2x daily. I’m also on one baby aspirin, and prenatals and waiting for my prescription for having a very slightly elevated TSH. So I just went to the restroom and I’m having some very light brown spotting. Of course now I’m TERRIFIED. Can starting the progesterone cause this? Has anyone suffered multiple miscarriages then had light brown spotting and had it be ok with a subsequent pregnancy? Has anyone had light brown spotting turn out ok in GENERAL?? Please please help!! Left a message for my Dr but in the meantime I need all the help and experience stories I can get!! Thank you so much in advance!! Oh I also quit smoking cold turkey the second I got a positive test, and haven’t had any alcohol (obviously) and my husband and I have not had sex since I got my BFP out of precaution. Thanks again for your replies! 😞😞😞❤️