weight loss? help pls..

i'm an 18 years old male from the philippines. several weeks after my sexual encounter to a stranger i loss few pounds BUT i am having diet that time but i am thinking that isn't it too fast for me to loss weight? i was also on diet also for several weeks at by the time it happened. i talked to a doctor and he tells me that the window period here in my country is six months so i need to wait less than one month because i had that encounter last January. i had gained weight 2 months after the weight loss because i stop my diet.

here is my question

is it possible for a person who losses weight as a symptom of HIV could gain weight after 2 months? help i need an answer. thank you

[Teak]

http://www.medhelp.org/posts/HIV-Prevention/patients-count-relation-to-cut-off-value/show/1252509?personal_page_id=1427566#post_5736877