I have fluid filled bumps on my shaft and it gets swollen from time to time and then it goes down to its normal size. I have been taking antiviral medication for the past 22 days, prescribed by my doctor. The bumps have not popped and haven't gone away. I have been tested for every STD That they can test for and they have all come back negative. My Doctor gave me a prescription for some acid to get rid of the bumps, but they are not warts. I think it is an STD, it itches and tingles. But my doctor seems confused by what it is or could be. Is it hsv2 or is it HPV? Please help, it is irritating. Any ideas on what it could be?