feeling overwhelmed

I deal with depression and anxiety on a pretty regular basis. I'm pretty good at keeping it under control and dealing with it , as well as beating it every day... but some days  it gets to be too much. My sister is getting married in July and I am the maid of honour... with that title comes with a lot of duties . I've got the dress and the shoes and my speech written etc , it's not the fact it's a lot of responsibility that's pushing me over the edge . I just feel like I've been doing so much for everyone else and not enough for myself. I've been working incredibly hard to finish everything for the wedding , plan the bachelorette and Bridal Shower and also get everything in order . On top of that I've been planning a birthday surprise for my mom which is on the 17th of may . I feel like I've forgotten how to take care of myself and how to focus on myself . I've been doing so much for others I've sort of lost myself and it's leaving me depressed. I'm left with no money to do anything special for myself. I want to do something to make myself feel special again . What are some things I can do to relax and focus on myself . I really need some me time .