Hey man, sorry to see you're having a bad day, but keep your head up. We are all confused at first and most of us are hesitant to begin the process, and with good reason. It's something that you should really take your time in considering because like Squirrel said, the changes are
permanent. Helping you figure things out is what a therapist is there for, so that's the place to start even if you're not completely sure that you want to transition. They can help you work through it and help you decide what's best for
you.
I personally have been seriously considering transition for nearly 2 years, and for a long while, I felt something holding me back as well. I had to do a lot of soul searching and praying to get to a point where I felt like it was okay to transition. It takes time.
Just take it one day at a time, and hang in there.

As for the buying guys clothes, start small: a t-shirt here, jeans there. Before you know it, you'll be cleaning out the men's department with no fear

Good luck