Hey, larisa,
Just slow down, you dont have to complete transition by next week. I suggest you take very small baby steps. Get yourself in to a level of confidence a step at a time. I started out just wearing undies, and over several years and several purges and one failed transition, I can go out as a female with any member of my family. May be look in your area to find a support group that you can test the waters, dressing and talk about what you are going through. It may also be a great place to get support on coming out, Second only to here.
The support is great here,as no two transitions are the same,and most members are willing to share their strengths and weaknesses.
Believe me Alot here have gone through some of the things you speak. My own experience has seen me think I was card carrying nuts, purge thousands of dollars in clothing. Only to have my girl side return in a couple of weeks. When you can gain self acceptance you will have come along way to be who you are, you may still get the negative feelings but the arent as strong and dont last as long. I would not worry about telling any one until you can have some inner peace about you are. Get support here and where you can , maybe speak to a gender therapist
edit: just read your stats... seen you been here for a bit... take what advice you can use