I started atripla about seven months ago, after my first three months I went from a viral load of 1780 /CD4 count of 340 to undetectable and CD 4 count of 408. After six months my viral was 208 and was detectable and CD 4 count went up to 488. My ID doctor don't think there is a problem he thinks I should cont. taking Atripla and retest in three months. Is there a reason I went from undetectable to detectable in just three months I never missed a dose I always take my Atripla at bed time.
Your doctor is giving you good advice. It is common for patients with excellent adherence like yours and with an undetectable viral load to experience 'blips', i.e. brief rises in their viral loads to 50-1,000 copies/ml, only to return to below detection at the next measurement. It occurs in about 40% of patients, and by itself is not associated with a greater risk of virologic failure of your regimen.
You could arrange to see your doctor sooner than 3 months from now in order to repeat the test and satisfy yourself that this is merely a blip, rather than the first sign of virologic failure, but I would agree with your doctor that, without another compelling reason to do so, you are safe to keep your usual schedule and repeat the viral load test when you return. If and when you do see your doctor, I encourage you to take this question and this response with you to the visit and disccuss it with him or her. In the meantime, you are doing everything that you possibly can to gain maximal advantage out of this regimen by taking every dose as prescribed every evening, so keep up that good work.