Glad you're getting back to normal speed. I don't recall any protocol or other guys' experience for CT scanning within a certain amount of time after carbo like you would get after a full attack with chemo (3xBEP or 4xEP). I think your CT scanning clock starts running from your last CT scan.
The NCCN guidelines revised in 2012 increase the post-carbo and post-XRT intervals to annual for the first 3 years. Post-surveillance is 3-4 months for years 1-2, every 6-12 for year 3, then annually. Surveillance and carbo intervals used to be the same so there was no radiation reduction benefit like there is now.
You may still be anxious but I'm very positive your have sent the seminoma to hell. Relax and enjoy.
"Statistics are human beings with the tears wiped off" - Paul Brodeur
Diagnosis: 05Sept07 Right I/O: 13Sept07; Pure Seminoma; Surveillance only per NCCN: All Clear February2013 (Chest Xray, Markers); Next check August2013 (CT Scans, Markers)