Canker Sore on Inner Labia, doesn't look like online pics of STD, HELP!?

[LBH20]

-Haven't had sex of any kind with anyone in a year and a half
-3 Year monogamous relationship before that
-clean bill of health including STD check (including herpes bloodtest) in 2014
-had mono end of 2014-no outbreak
-had bipolar crisis for all of 2015-no outbreak

So Easter sunday, I got really sick out of nowhere. I've never had a sickness hit me so hard and immediately. I had vomitting, fever, intense chills, aches, muscle pains, and my ears hurt
Now that I've recovered which took 4 days, the next day I notice my inner labia itches right near my vaginal opening and urethra. I have been fighting a UTI for a couple of weeks but it was never really bad, I just felt like I had to pee all the time. Since it itches, I noticed 2 small bumps. Looking at it with a mirror, it looked like two very tiny bumps with no head, no blister, just irritation. The next day, these turned into two bigger canker sore ulcer looking things. Less than 24 hours. Labia swollen, red rim, white covered craters that were painful. I'm looking online at herpes pics and it doesn't match, looked at chanchroid and other ulcers looking things and none of the pics match. I plan to see a doc on monday. But the white stuff shed a bit and it looks kind of black/grey underneath. That was this morning, now the white stuff is covering again but I have 2 more under those 2 on tops that I didn't see due to swelling I guess. They are not in a cluster, more of a line. SO, here's my query, if I've had no sexual contact of any kind, a clean bill of sexual health prior, what could be going on?? Please try to think outside of herpes. I'm prepared if it is even though I've spent about 3 days now scouring the internet and I don't think it looks like any stage of that. I also have a friend who has it so I've been talking to her.

The internet says you get an outbreak after 2 to 12 days of exposure. If I haven't had sex....what else could it be? Anyone have this tying happening to them??

also, I had no sore throat when I was sick and no enlarged lymph nodes anywhere if this helps. Also, the UTI I think I have is not confirmed and it may be a yeast infection instead or as well...I've got a lot going on down there right now so IDK! Would reallllly appreciate any advice someone has!