Preterm labor symptoms

Shelley
Last night I woke up around 3am and started getting really painful menstrual like cramps..not bh bc my uterus wasn't tightening up..I timed them to be about 25 seconds long coming about every 10 minutes for about 3ish hours. .I was also slightly nauseous. Kinda gassy too but not constipated..my hands and feet had swollen up that day too. I had drinken about 64 oz. Of h2o during the day..it's now 4pm and I'm not cramping anymore..just wondering what yalls thoughts are on this..no bleeding or leaking fluid or else I would have went to l&d to get checked