Help! Something's thumping/pulsing in my [body part]

Something is thumping, drumming, pounding—how do I even describe it?—about two inches to the left of my belly button, deep inside my abdomen.
It’s not painful, it doesn't bother me, but it is incredibly weird. It's been going on for two days now and honestly, I'm starting to wonder if some kind of alien is trying to claw its way out of my gut.
Does anyone have any clue what on earth this could be?

Sandra King4 said:I’ve got this thumping, drumming sensation—it’s hard to describe—happening inside my abdomen, about two inches to the left of my belly button.

😂
Since the heart pumps blood into the aorta in rhythmic surges (roughly 70 beats per minute at 70 mL each), the blood flow through your arteries naturally pulses. Because arterial walls are elastic, they expand and contract with every surge of blood passing through them. This creates a pulse that you can actually feel, especially in areas where the vessels are closer to the surface. By checking that pulse, we can essentially count your heart rate. ....🙂

No shit, Sherlock Holmes....🙄

No, you're missing the point entirely. It feels more like a contraction, or maybe some kind of muscle spasm or a pulsing nerve... But look, I’ve never dealt with anything even remotely like this before, so yeah, I'm freaking out. Okay?