How can I regain self-confidence on myself again?

Hello there! I am not good at writing this kind of stuff, but I'll try to anyway.
I've been learning English for a quite some time, almost 4 years in fact, but lately I'm having some struggles using the language as my second language (I started to do this in late November). Sometimes I don't know how to write a sentence properly, I don't know the meaning of some words and even my reading/listening took big a hit, and these are the two strongest points of my English in my opinion.
If someone can help me, please, I beg you. Since 2017 is my dream to become fluent at English, it opens so many doors that I couldn't even imagine back then.

Oh, if there are any grammatical mistakes and/or out of place words, feel free to correct me