Funny feeling in pelvic area! Any ideas?

So on and off today iv had sharp dull pains (not like breath taking but sharp) in my pelvis area and also so a fluttering feeling the best way i could discribe it is, those 'magic' magnetic jumping beans kids used to play with bouncing around or a trapped butterfly flapping around in a womb area. I dont know for sure how many dpo i am as my opks werent 100%. But anyone have any ideas what this is ? Im not getting my hopes up we have been trying for a year so o dont symptom stop either but this is the first time iv felt like this xxx