Cramping, but too early?

Elizabeth • | Wife💍| Baby girl born 7/12/19 😍

I had about an hour of slight cramping this morning, and intermittently since. I'm around 4-5 dpo (guesstimate since I did not use OPKs this month and this was the one month my CM was unreliable for pinpointing an exact day 🙄). This doesn't feel the same as ovulation cramps, though, and feels more in the central uterine area. Also my CM is white and creamy now, so I don't think I'm ovulating late. Wouldn't this be awfully early for implantation cramping, though? I didn't have any with my first (that I remember), so I'm not sure what's going on. I was definitely not this antsy with my first! 😬