Help! What is this?

22 weeks prego...3rd baby...and lots of normal movement so far.

2 days ago I started feeling this fuzzy feeling, like a rush of liquid (reminds me of the rushing feeling when they take your blood) in my abdomen.

Then, yesterday it became consistent ...in the same place, my left side I think behind my pelvic bone. It comes and goes consistently throughout the day, and I can't feel it from the outside.

Is it a nerve being kicked perhaps? I never had this feeling with the other 2 pregnancies, and there is no pain associated with it, but I'd still like to know what it is and see if I could stop it!

Thanks!

I have to go to sleep now but am eager to read some replies in the morning! ;)

Now it's more consistent. This is scaring me  

Call your doctor.