Re: swelling INSIDE my vagina (maybe tmi)
I'm not sure if your issues have already resolved themselves or not, but this sounds very troublesome. Just because you son't have insurance does not mean there are not options for you. If there is a Planned Parenthood in your area, they do have help for women's health, including pelvic exams and STI testing. It is always possible that you have some sort of infection that you and your partner have yet to discover. It could be a local skin condition such as a reaction to something like soap, laundry detergent, or a tampon. You can suddenly develop allergies to things you've used for a long time. The vulva is especially susceptible to chemicals because it is warm and moist. This is also a perfect situation for bacteria.
Are you having any pain associated with this? Either externally, vaginally, or lower abdominal/pelvic pain. If this hasn't stopped I would urge you to find a health clinic, health department, Planned Parenthood, other women's health service, or even an ER (they are required to provide medically necessary treatment regardless of insurance/ability to pay) because this could be a very serious issue. Especially if you have any fever, chills, headaches, nausea/vomiting, diarrhea, rash, etc you really need to go to the ER.
But if it has resolved by now, it could be any number of things. We women really have a delicate issue with our vaginas. Just a slight imbalance can really mess things up. In general, make sure you use no scented washes/soaps in the area, don't over wash the area, wear only cotton panties, you may want to wash your underwear in a special wash, with a detergent for sensitive skin.