Vagina problems

So in November there was a night where I was mad horny and my BFF wasn’t waking up so I went to handle my Business on a old ass couch. Instantly regretted it. Couple days later my vagina is hella leaking out a whitish, bleacher smelling discharge and it itches a little so I went to target and got some bacteria medication and used it for awhile and it went away, but now it April and I can Manage it but it’s itching a bit more and I see a bump ( I think from scratching it to much) Is this a STD or a bacteria infection? And I don’t have any health insurance so I was wondering if there’s a home remedy I can use to fight it? This is ruining my sex drive pls help 🥺🥺🥺