Weird pressure/pinching over a week before AF?

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AF isn’t due until Thursday/Friday this week but since last Wednesday I’ve been having weird feelings in my lower abdomen that I’ve never experienced before. It’s really hard to explain but it’s kinda feels like tingling/pressure and a couple of times a day it becomes more noticeable with definite pinching. It’s mainly on my right side but has been on my left a few times. I’ve ruled out implantation as I’m getting negative tests and surely if it was implantation from 5 days ago that would show up?? Just wondering if you ladies experience this and if it’s a normal AF symptom? I’ve never had it so I’m slightly confused