So happy to hear news like this!
You're supposed to take progesterone at least until week 9 but I stopped mine at week 9 and started spotting a lot, so I went all the way to week 13 as the doctor recommended, so don't stop it and wait until you confirm it's all good with your doctor.
I also had a lot of chemicals last year and I never stopped the progesterone until the doctor told me to based on my betas.
Hoping it all works out for you!!!!