Uterus stretching??

Basically I've been feeling this dull shooting pain/tugging for a couple of days now. I'm 11 weeks pregnant, it's more towards the left side and starts sort of lower stomach towards my pubic bone. It's not round ligament pain because I've been having that since week 6/7 and I recognise the cramping. It doesn't feel like period cramps, doesn't really feel like any kind of cramping I've had before actually. Is it my uterus stretching?

EDIT: I'm now experiencing an increased amount of discharge