Hi Jenny,
I'm sorry you had those rejections.
I hold pity parties quite often. Had one today. I didn't get total rejections, but partial rejections. An editor really gave it to me. Liked some of my stuff, not all of it. I read the critiques and said, "What?" I was thinking, "Nit picker!"
Whenever I get really down on myself, I find something good I've written (or had published) and read that. And I pat myself on the back for doing a good job.
Have faith in YOU.