I am due next Saturday and just noticed...?

I know a lot of people are going to think this is stupid, but I am a little concerned. I am due the 9th of July and normally I have the thick normal discharge. I haven't seen the mucus plug, I know what that looks like, I lost it with my first child. I don't know what to expect this time because things have been so different. Anywho, I went to the bathroom a while ago, I don't even bother holding it anymore, and I noticed that my pants are always a little damp, now I am having the thin loose waterlike discharge. It isn't heavy like it normally is, it's just watery. I had noticed yesterday that I was feeling a lot of pressure when I sat, stood, or laid down. I wasn't dehydrated or anything, just felt like baby was going to fall out of there. Is this normal? I didn't experience this with my first pregnancy and I don't know what to expect this time. I don't want to call the doctor, they always have an attitude when I have a valid concern, which is at least 1 time per month, if that. Advice or opinions or experiences please before I call the labor and delivery nurses?