I am 34 weeks pregnant for the last two days have experienced mild cramping, nausea, low back ache, weak and tired, loose stools. This is my 5 preg?

G.I. "contractions" Make sure that you are not in early labor so that only feces not fetus is being passed. A fifth pregnamcy usually puts the fetus on the "express down elevator" so check with your OB md.