I've had foamy urine for close to 2 weeks, i've done a urine analysis 2 days ago which showed nothing. i've also had unprotected sex about a month ago, i did an std test 1.5 week after (negative). i've been drinking more water, still foamy. help?

Foamy urine can indicate elevated protein level, which in turn can be due to various kidney health problems. Did your urinalysis include a protein test? If not, repeat the urinalysis including protein. In any case, foamy urine is not usually a sign of an STD or any other infection. See a doctor if it continues and/or you remain concerned. Good luck.

If you had a normal UA then there is nothing organically wrong. The commonest cause of this is the urine striking the toilet at a force and angle to cause micro bubbles. Some bacteria can do that too but your urine is negative. try sitting on a toilet and voiding and see if that changes. Good luck