1st pregnancy 11wks 2days cramping/spasm

Currently 11 week and 2 days. Since sunday morning I've experienced some mild cramping/irritation. While walking cramping was more noticeable/irritating. I've sat down twice and felt: I don't know how to describe like a quick sharp spasm in my lower pelvis. It's doesn't last long, I have no spotting. The cramping isn't consistent or aggressively painful, feels like I have a full bladder. Is this the normal stretching everyone describes? I have a follow up appointment booked.