Totally going to out myself but here goes.
For the last two weeks I have had a vibrating sensation in my lower tummy area around the area that my womb may be (?). It comes and goes throughout the day and feels as though something is inside and banging away very quickly trying to get out 
I am 100% certain I'm not pregnant unless it is a 7 month concealed pregnancy. I am waiting for an x ray to see if I have a trapped nerve in my right arm as it goes dead if I lay on my side and occasionally on my back.
Could it all be related? Should I see my gp? I have googled but didn't come up with much so I'm hoping someone will be able to tell me what this is as it is getting a bit annoying now.