First pregnancy

I’m pregnant with my first baby and I’m thrilled! I’m about 3 and a half weeks. Very early I know! I took a few of the early result tests and they all came back positive. I do have some cramping though, it feels almost like pre period cramps, not the intense cramps but the small ones that happen about a week before your period. I’ve been getting this daily for the last week and I was just curious if this is normal and when/if I should start being concerned about it!