Pls help!! Scared of preterm labour!!

Hi everyone. So I'm 30 weeks today and just recently I was bleeding. Nothing was wrong but found out I was a little dilated already. (Barely a cm) I'm on bedrest because I don't want to bring on labour but I was walking a bit today and now my breasts won't stop leaking. There's wet spots on my shirt constantly, it's just streaking out and I'm freaking out because nipple stimulation apparently can cause labour. I really don't want her to come yet and I'm very scared. Is this normal or should I be worried??