I have a very important question!!

Macey • I'm 18yrs old second pregnancy first child a boy. Who should be arriving around December 4th 2015, his name is Patrick James Noonan and daddy and I are still together.
I'm 27 weeks 5 days pregnant and 17 years old. I was just at the hospital 5 days ago on Saturday for dehydration and was having mild contractions that went away after they started an IV. And right now I've been having light cramping in the left and right side of my lower abdomen and its also been really hard. But these past couple minutes they've been getting more painful and TMI but were all pregnant so who cares. I've been feeling my vagina ache and it feels stretched when I feel around. I'm just really worried and every time I wipe little drips or bright red blood are on the toilet paper, it's happened about 20 times. And o was looking things up and didn't know if I should worry because he's still been moving a lot and I have drinken about 4-5 big glasses of water in the past about 11 hours. I also had intercourse yesterday. I just want to know what you mom's think I should do or if I should be worried.