Strange Feelings In Lower Stomach + Clitoris After First Orgasm

I, 19F, recently experienced my first orgasm (which is a little embarassing to admit), but I've started having strange feelings in my lower stomach and my clitoris since it had happened. Both my stomach and clitoris feel airy and hollow, but my stomach also feels like there's pressure being put on it. The sensations go away when I walk, but if I'm in one position (usually laying or sitting down) it comes back, and the feeling gets a little more intense. My clitoris also keeps mildly throbbing, even though I'm not aroused at all, and it's starting to become annoying. This has been happening for the past 3 days now. Is this normal, or should I go get it checked out?