should i be worried?

Martinez

im currently 35w&4d and i woke up a few minutes ago and had a crampy feeling along my whole lower stomach and i went pee and it went away i laid back down and i started having this sharp pain that lasts literally like a second then it goes into a lingering dull pain for a few more seconds then goes away but comes back pretty often and is in the lower left side of my back is that normal or something i should be worried about?