contractions?

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ok so this is my 4th pregnancy and you would think I could tell what was a contraction by now but.... any ways im 33 weeks measuring 35 weeks 3 days this morning I had went to the bathroom and I haven't been constipated this morning I just felt the need to push a little harder to have a bowel movement. I had a feeling not really like a pop but I could tell something wasn't right so when I wiped I was bleeding...it stopped after an hour and it wasn't like gushing, the nurse I spoke with said she thought the bowel movement caused it and to take a stool softener.....well now I keep cramping... nothing that's super intense but enough that its uncomfortable. I haven't been timing them or anything. my last pregnancy i went into preterm labor and the contractions only felt like the baby moving and I had a c section before I went into labor. my second pregnancy my labor was 31 hours but I had an epidural before I started really hurting and I didn't really hurt i was just very nauseous and crampy. the first one my water broke and went from nothing to a 10 within seconds....so now I'm confused as to if im feeling BH contractions or true labor contractions...