something strange

when i was on the loo i put my fingers inside me to check CM n felt what seemed like a spot / small lump.. im not exactly familiar with my insides as i have very small hands and cant reach very far up there. i askd SO to have a feel n he couldnt feel it (it did lead so some very good baby dancing! ;) ) is it possible that i felt the beginning of the opening of a firm cervix (never felt it before so idk) or something more suspect.. if there was something wrong wouldnt the sonographer had seen it when she did a scan vaginally before my misscarriage a couple month ago?

im trying not to worry as i have no idea but its a thought niggling in the back of my mind constantly. x