Hello Madina It is completly normal, don't worry ! You just need to practice with someone who will guide you step after step. Don't be shy it is your future we are talking about ... I think the best advice here is to email to a teacher here on Italki who will be happy to help you with your speaking.

I think a different part of your brain is at work when you speak. If you already have a good understanding of written english, then you could look for a conversation course that uses the "natural" method, which would be based on speaking only.

Hello Madina, There are many different skills to develop when learning a language: Writing and Reading skills differ from listening and speaking skills. You have developed the writing and reading skills more than you did the others. To improve your speech you have to work on your speaking skills and apply various learning and practicing methods that contribute to an improvement of speech. Is your learning method based mainly on reading, doing exercises, writing ? Do you use relatively less audio material such as audio lessons, music , TV programs, voice chatting etc...?? Do you speak with native speakers ? Probably you will be doing less of those oral practices that could enhance your listening and speaking skills. It takes you to adapt some other methods and adjust your way of learning a little emphasizing on those helping to improve your ability to speak fluently. Good luck:)