You are definitely overwhelmed. I think you need to go back, pull out all the projects and evaluate all of your unfinished projects. Determine if you even like them anymore. If you don't like them - get rid of them and don't look back. yes, this is hard to do, but necessary. The ones that you really do want to finish try to come up with an order. Start with one, and then the next. As they say each long journey starts with a single step. I think once you get that first project completed you will be ready for the next.
I am a Gemini and my mother would tell you that I live up to the description, always doing 2 - 3 things at once. Now I believe they call it ADHD, and I am good at finishing what I start, but it is rare that I only work on one project at a time. There are times that I even start a second book even though I am in the middle of another. And I went into my sewing room one day to find 5 quilts that I had started, they were all cut out and sitting in boxes - and there are numerous patterns yet to be started. It was time for a reality check. That was last year, I have just finished all 5 of the cut out quilts, starting the next one that I had promised to make and I am not going to buy any more patterns until I have used a few of the ones I have. I cannot resist the magazine the Block - so that is my indulgence right now. I just refuse to start a new project until this next one is done.
Every quilt I make, half way through there is something I don't like about it. Either the pattern, or the color choice or one of the fabrics. I don't know why, but it is every single one. It drives me nuts. That is usually when I am easily distracted and go for the new "interim" project. I have to really fight that temptation.
Good luck! You can do it!