Fast baby movements?

Ga

I’ve noticed my baby kicks pretty fast. Like the closest example I can think of is how on iPhone one of the vibration settings is set to Rapid. Kinda feels like maybe he’s spasms or does that quick feet kick that kids do when they throw tantrums like this⬇️

Is this normal? Could it be a spasm or seizure in the womb? Is that possible? I’ve never been pregnant before so every little thing worries me. I have a doctors appointment in a week so I can ask him then but I would like to hear from women who’ve been pregnant before. It only only last like 4-5 kicks but it’s so fast and he does it almost every time he moves. 28 weeks