Normal Pain??

I know along with pregnancy comes aches and pains.. it happens. Your body is changing and expanding but is it normal to have lower abdominal pain, feeling of tightening to walk and pressure almost everyday, worse when up walking for longer periods of time (1hr+) ?? I'm only about 25-26 weeks. I asked last time I was in at the OB but the doc they gave me was a student training. She said she would tell my doc but didn't come back with an answer.