Swollen labia

So my left labia decided to itch last night and then it swelled up really big it looks like theres liquid inside but i dont know, its pretty hard and hurts to touch... Also i was leaking out what looked like cum but im not sure what it was 😅😳😖.. I havent had intercourse since last week and weve been doing it for 2 years with no problems what is happening ... Also i noticed a really bad smell about two days ago and now its gone please help!!!!