Transdermal T Washout Period

how long does transdermal t stay in system?
Im using 5g gel over 10 days, so 0.5g per day as part of hrt… however im also involved in sport- dont want to be caught doping,…
how long does it take to washout of system?? really appreciate any advice here guys, im competing in a high level comp end of June next …freaking out here!