Progesterone cream!

Betty boo
I've been ttc for over 2 years now with bub #1 and during this time I've had 2 miscarriages both at very early stages. It's been a year now since the last miscarriage and can't even fall pregnant again. 
I have an under active thyroid and take meds daily I even have one blocked Fallopian tube. 
I've now kinda given up hope seeing another doctor who is getting me on a more natural thyroid meds and going to take progesterone cream. 
Has anyone tried this?? AF hasn't been the same either I will spot alittle for the first 2 days only when I wipe I see alittle brown and then bang it's starts. So not sure when I should also start calculating the first day of my first period. I'm so confused and would love some answers