Family barely checks on me and my baby.

I just need to let this all out. I'm sure this is a common occurrence, but I thought it would be different. I have always been close to my family. I am the youngest of 3 and my sister and brother both have children. The only person who has really helped me is my mother and she doesn't really check on me. She will offer to babysit or come over, but it is just to see my baby. I thought my sister would check in on me so much more frequently. I was 18 when my sister had her first baby. She lived 5 hours away and I was at her house for the majority of time for 3 months before she gave birth. I helped her set up the nursery, planned her baby shower, visited after baby was born. I stayed with her for several weeks after the baby was born to help her and continued to drive back and forth very often to help. So did my parents. My brother even went to visit several times. Here we are, 8 years later, and I had my first baby. She still lives 5 hours away. She did help plan my baby shower, but my baby is almost 6 months old and she has seen him twice (a couple hours each time) and has barely called or texted to check on us. My brother has visited twice, but took over a month to visit in the beginning. My dad has came over 3 times for about an hour each time. My mom is the only one who has came over consistently.

It is probably obvious that I am most upset about my sister. I thought she would be there for me so much more, even if just a call or text. I feel like I over estimated how close we were, or it was all one sided.