Cramping!

Sam • I`m 22 and my hubby is 23 we are currently TTC baby #3, I`m so new to all this any advise is more than welcome ❤️
I'm currently 4dpo and having twinges and really light but sudden cramping on my left side but it went on for about 30 minutes on and off, I didn't use opk's this month but going by my CM and CP I thought I ovulated 2-3 days prior to what glow recommended. Anyone ever get confused by glow like this before? If I did ovulate early I'd be 6-7 dpo