Waters breaking at 28 weeks?

Elaine
I was in work earlier and I felt really wet down there, when I looked at my pants, there was a big damp patch, sorry tmi 😳
I phoned my midwife and she has told me to lie on my left side for an hour and to wear a pad, when I stand up I have to check the pad for more leakage. 
I'm so worried 😢