Skin around my clitoris swells up to the size of my labia minora (like I have 3 labia minora)for days after sexual activity. Is this normal?

Normal. The skin around the clitoris (also called hood) becomes engorged (or filled with blood) during arousal. The inner labia do as well. Typically, after orgasm, the swollen tissues go back to their normal size. But, this can take awhile for some women. Most likely, this is completely normal. Ask your gynecologist during your next annual.