hard lump on penis

i have a problem with ingrown hairs on my penis. i discovered a lump on the underside of my penis almost two months ago. i let it go assuming it was a ingrown hair. then it started to grow and is now about the size of a pea, hard, easily movable, round and when squeezed i can sometimes get out a white or clear fluid. it is non painful, unless squeezed. i went to the clinc and got tested. i came up clean and the doctor who examined my lump said it did not appear to be an std. i called a doctor and tried to schedule and appointment. he directed me to the nurse who told me that it is a cyst and to apply a warm cloth or heat press to it. she said it may go away in a bit, if it doesnt to contact them.
my concern is that it has not been officially diagonsed by a doctor. are they correct about the cyst or just telling me what i want to hear? i assumed it is an epidermal cyst. also i was wondering can they be passed on to partners during sex?

do it work i have the sma problem hard jelly bean size bump on base of my penis