3 minutes interval

Hello mga momsh! Ask ko lang po sana if I should go to hospital na? I’m 39 weeks now, running 40 weeks this coming saturday, October 5 2019. Kahapon nilabasan ako nang parang malaking jelly pero kulay green (not sure if yun ba yung tinatawag nila mucus plug) Then early this morning, at 4AM, nag start na sumasakit yung puson ko sobrang sakit pati likod at balakang. The pain last 40-60 seconds then bumabalik after 3 minutes. Pero no sign of blood, wala pang dugo or hindi pumuputok panubigan ko. 3 hours na po pabalik2 yung sobrang pain every after 3 minutes. I want to go to the hospital pero baka pauwiin pa ako. Is this sign na nag lalabor na po ako?