Hi tiger, how are you doing? did you g to the doctor?
I was experiencing extreme pressure and heaviness around my 23rd week...it worried me and so I called my docm. She said it was normal but had me come in to be checked anyway as I was nervous about maybe preterm labor or incompetent cervix...everything was just fine BUT I found out I had a urinary tract infection (first ever). I felt much better after the round of antibiotics she prescribed.
i have been having more braxton hicks contractions this time around as well, if your concerned take it up with your doctors, they should know what's best