scared to breastfeed

I'm 31 weeks pregnant and all the way through I've said I've wanted to breast feed and now the time is getting closer I'm getting a little nervous about it. I suffer with anxiety and get very nervous when out and about, I know that breast milk will be the best for my baby girl but I think I'll be too nervous and scared to be able to breast feed while out and about. And worried I'll be stuck in the house all the time which is not good for me or my little one. Really don't know what to do.....heeeellllppp!!