I have a very similar story… 61 years old and steroid shots in hip - 2 times and each time had a period about 2 weeks post shot. Same response from US revealing small cysts. Ended up going with a full hyst this past March. Don’t want to go through the angst of possible cancer while waiting on results. Feeling great after. Haven’t had another hip steroid shot yet but don’t anticipate there being any issues going forward.