Swollen Labia??? help

Sorry for tmi. It got really itchy out of no where down there, but had just shaved a couple days ago so I figured it was just from that. But after scratching a bit I noticed it has blown up like a balloon. Its not lump like or painful, and there's no discharge other than usual (bc I just ended my period 3 days ago). I used so hydrocortisone and went to sleep and this morning it's not as big or red...but still swollen. I don't think it's a yeast infection bc there's no discharge and it doesn't itch anymore. It's not painful, just weird feeling. What the heck is this?? (Also I don't currently have a doctor to consult, I'm in the middle of switching from a pediatrician to an adult doctor so like...I don't know what to do.) please help! I'm freaking out a bit!