You are over-whelmed!! And at these times our hormones and emotions get all messed up.
I had a situation where my first cousin was getting married and I was in graduate school. They planned the wedding in November around Thanksgiving. It would have been a plane trip and then a drive on top of that...my husband could not go (we didn't have kids) he was also in grad school. He was very clear that his thesis deadlines could not be met and go on a trip. Mine were the same way but I thought that maybe I could work on it while I was gone...then debated back and forth, back and forth...I ended up not going. My husband and I never traveled over Thanksgiving while in school there were always too many projects and papers to work on...it was a week of buckle down and work for us.
I was very sad about this and my cousin and I were and are very close. She was in my wedding. She had all her besties in her wedding, no family due to drama.
To this day I regret not going...I blame the stress of school, being newly married myself, and the thought of such a long trip alone overwhelming. I am still kicking myself. However I know for sure I would have missed a deadline if I had gone and I had already missed one previous to this due to my mom having surgery.
I spent a while beating myself up and sometimes will think on it with regret. However, life does go on...they celebrated their 17th wedding anniversary last year coming up on their 18th this year. I send cards and remember them long after the event when not many other do.
Cut yourself some slack. Give yourself a hug for being there for your mom. I am sending you a hug!! Life's disappointments can be tough but we are strong women!