Missed miscariage, 2 MVA and not done yet :(

Hello all, I have a hysteroscopy procedure next month to remove the adhesion that resulted from two MVAs early in the year from my MMC. My doctor seems to think that I can get back to normal activities the day after the procedure including running or whatever I want. I am confused and scared that not resting is what caused the scarring at the first place as I did not give time for my body to heal. I am interested in other view points, what did your doctor recommend and what did you do do to heal well? Have you also needed more than one procedure ti remove all the tissues ? thank you