28 weeks and dilating already

This is my second pregnancy. With my first pregnancy I was very out of the loop amd not sure what was going on with my body and what was normal (being 17 and pregnant). I got pregnant 2 months after I gave birth to my son. With my son I was so big that I couldn’t check my cervix but with this one I decided to give it a try. From what I can tell I can fit 2 finger tips in my cervix (most likely meaning 2 centimeters dilated. But is it normal for being 28 weeks pregnant? I have been experiencing a lot of vaginal discharge and a lot of pressure and pelvic pain.

I did however go into preterm labor with my first but they stopped my contractions until his due date.

Any stories or advice?