Just need information. Year of expousre.

I had an unprotected sexual intercourse on january 2015..i dont know the HIV status of the woman..After 3 months i have had some itchy skin rashes on my back chest and leg..those were just dot like rashes.on that time those rashe comes disappears for a couple of time.then i get scared of HIV and got some anitybody test.i have done more than 10 HIV antibody test post 3 months of the sexual exposure.i have done 3 HIV antibody test post 6 moths of the exposure and 3 one year after exposure.so i just want to know is it clear?should i stop worrying..till now sometimes i get scared of having HIV..is it possible to have 3 false negative antibody test even after 1 year of expousre.i never had any other exposure from the last one..anything happend to i just think this might be due to HIV..i m so much depressed.plz help me as soon as possible with proper answer. Thank you..