Pregnant and planning wedding

Anybody else finding it hard to plan their wedding, hens and the arrival of a little one? I feel so over whelmed. My sister is my maid of honour and organised my hens to suit herself and her friends. When I suggested changing it she flipped out and told me to sort it myself. So that's what I'm doing. But she is the one who was organising the bus. And she is refusing to give me details or help me sort it because she's butt hurt that I thought her hen plan was too expensive and not want I had in mind. Now I'm finding it hard to get it sorted. Nobody is offering to help me at all and I'm due my baby girl in 4 weeks time. I just want to cry. They messed up my baby shower and I had to cancel it even though I was looking forward to it. Why do people always have to suit themselves. Does it get any easier?