well your doc is correct, a bad TRT protocol could cause cardio vascular problems, meaning if you let your Hemoglobin, RBC and Hematocrit elevate too high then yes you will face the risk of a stroke or heart attach. this can easily be taken care of by simply donating blood as needed to keep these levels down.
He is also correct in running the labs you mention, but make sure to run them the same day of your test shot but prior to the shot. it is best to go twice a week this will help control/manage your E2 much better. 200mgs a week is far out for TRT in my opinion, but BW will tell you if you need it or not. what is your complete protocol? Test, hCG, AI?