Baby feels like he’s twitching?

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So I’m 29 weeks pregnant and lately baby has been feeling like he’s twitching. It’s probably the best way I can describe it. Very rapid movement that last about 30 seconds or so. Has happened 4 or 5 times now. I read it can mean fetal distress.. with everything going on I don’t want to go to the hospital unless very emergent. Does anybody else know what this could possibly mean?