Yes I meant the medical exam!!
Should I wait couple of days and wait to see if they received it ?
You can but since you didn't include a copy of the actual RFE when you sent your medical they can say you never responded to the RFE.
Again, just to be safe I'd request a copy of i-693 (should be cheap or some doctors would do it for free) and send it again with the copy of the RFE.