32 weeks with twins and feels like I have to use the bathroom

Constipation 

I've the feeling eases up and u feel like u don't have to go anymore, it may be contractions. I was feeling that way last week but my lower back was hurting to and I went to the ER. They told me I was having contractions and gave me a series of shots to stop labor. 

Ask your Doctor.. I had a friend pregnant with one baby she had no idea she was in full labor.. went to the hospital and delivered less than an hour later

That happened to me. I sat on the toilet for an hour and finally gave up went to the hospital and my water broke a couple hours later

I have this and they keep saying it's because my daughter is low and I have lots of pelvic pressure