Hiv/aids tests. Be detectable?

Do western blot results vary from labs to labs? I got tested using tridot after 8 years of exposure and it was negative. My western blot also negative but there is a pink line in it. Near gp 40 region which is horizontal. It doesnt look like a band. A tinge of mild pink line. I asked the doctor they said nothing to worry and the report says no bands detected. My questions are 1) can i rely on those lab results? Can i ignore that pink line and believe my results are negative? 2)suppose if i had developed aids,will my antibodies be detectable? My lymphocyte percentage a month ago was 48 % with wbc count 8100 So my lymphocyte count is 3900+ 3)my symptoms of loss of appetite, going to the loo after eating, feeling tired and weak, feeling chills , sleepy are persistent after taking medicine. 4)my doc says he is  100% sure that i dont have hiv(i have visited him 6+ times in the past one month) Please tell me what i should do.