Go to the ER or no?

I'll be 10 weeks next week and for the past 3-4 days I've been cramping and having pains in my lower stomach, cramps goes all the way to my lower back i feel like it gets worse everyday....

Idk if i should go to the ER or not...

And my fiance doesn't really take me serious hes like just take tylenol. I'm like um thay doesn't help w this pain!