I think I might be in early labor?

Abbey

So this morning my husband and I were intimate (tmi sorry) and shortly after I started feeling period like cramps. They were happening nonstop for about an hour, now I’m still getting them along with a back ache that feels like back labor. I feel like this might be the beginning of labor but I’m not sure! As a second time mom I thought for sure I’d know but with my daughter I never had this, I just started getting hit with major contractions every 3 minutes. This is more like a lingering pain that gets worse and then goes back down