Dancing on my butt!

This is my 2nd pregnancy.  I felt movement really early with them both.  I keep getting the feeling that I have to have BM but go and nothing (I'm on Zofran so constipation is an issue).  Well as I sit here a little more still I realize that I can feel the baby kind of down and lower towards by colon from the inside.  I think that combined with the constipation is making me run to the bathroom non-stop.  I do plan on keeping an eye on things because I realize that sometimes the urge to 'bare down" can be contractions but I don't really think that's what this is.  I think it's an annoying little butt dance!  

Can't say this ever happened with my first pregnancy!