Mama, go to your hospital or birthing center right now, especially with contractions every 4-5 minutes and back pain + cramping together. Hindi ko kaya sabihin kung active labor na ba yan, pero ang pattern na yan ay dapat bantayan ng doctor agad, lalo na kung close na ang due date mo. Alam mo naman, better safe than sorry sa ganitong situation, mas peace of mind para sa iyo at sa baby. Samahan ka ng partner or trusted family member, okay? Sana lahat ay okay lang.