Retired NFL star Tom Brady has reportedly been thrown for a loop by ex-wife Gisele Bündchen’s hot romance with jiu-jitsu trainer Joaquim Valente, RadarOnline.com has learned. A bombshell report claimed that as the happy couple talk wedding plans, Brady, 46, is wondering where it all went wrong! “Tom knows the ship has sailed as far as him getting back with Gisele, but that doesn’t make this any easier to swallow,” an insider revealed to the National Enquirer. “He can’t help but wonder how long it’s really been going on.” In fact, Bündchen, 43, and Joaquim, 35, already seemed to be cozy with ea…