The HIV virus dies within nano-seconds when being exposed to air outside the body. The chances of you getting HIV from someones blood hitting your eye (assuming they have HIV) would be very poor.
I have OCD too and I worry a lot about those kinds of things too. STDs and anything you can accidentally acquire throughout your life...there is nothing wrong with getting tested especially if you are sexually active...but when you worry obsessively about anything it is counter-productive. Keep your head up and try to look at this problem realistically. There is no way you got HIV that way!