Cycle Days 25-28

Gwyn • Sun, Feb 16

I started having a few dizzy spells on the 25th and then on Cycle Day 26- today (cycle day 28) I’ve been cramping. Could this be from implantation? I took a First Response 6 Days Sooner test and it’s negative but my cycles last from 32-37 days so I’m not sure when to actually be testing. I’ll attach a picture Incase anybody has any suggestions!