I ran ostarine @25mg ED. I didn't run into the side effect/symptoms you mentioned until the end of the 4th week. Caught me off guard to say the least. Nothing 6.25mg of aromasin didn't fix though. I only had to dose it once as well, so it really wasn't an issue, so you should be good if you can just get that under control.
My guess is that you're estrogen sensitive (mine was at 60, top range for male is about 45), and I think ostarine lowers SHBG, so this where any gyno would come from to my knowledge. Hope this helps.