Emotional wreck

Well sorry to post but I really need to talk. Today is my birthday and I'm 36 weeks and 2 days pregnant. My grandmother (father's mother) passed away on Friday and I'm having a hard time dealing with all my emotions. My parents are divorced and she was not a fan of my grandmother. I had to cancel my baby shower due to the funeral. To make matters worse if possible my mother stood me up for lunch. For the past 15 years we have always gone to lunch on my birthday. Today she didn't even call me until it was time to pick up my daughter from school (after 2pm). She had a ton of excuses but she forgot. I understand it can happen but my birthday is on a holiday. Everyone knows today is Halloween. I know this is petty but I can't help but be upset. My so wanted to take me out and spend some much needed quality time alone and I refused since I had plans. We haven't had any time alone in weeks. Now I have spent my birthday day all alone. I am sitting in car pool line crying like a baby. Between the loss of my grandmother and my mom's rudeness I feel so unloved and lost. It's stupid I know I just can't handle anymore.