Hello Doc, I'm Brian Here Would Like To Know, I

Hello Doc, I'm Brian here would like to know, I have been taking CF meth while having fun with guys and of course we use the condom. But I don't take it often just once a while. What are the best ways to remove it from my system? I also intend to do Medical check up but since I have taken it, when can I go for the medical checkup.
How long does it stay in the body? I was adviced from my other friends who have taken it, to drink more water, more fruit juice to flash out the meth from the body. Need more advice