Can you check it for me please?

Hello all. This is not homework or something similar to it. I have already sent this message to my teacher but I am curious to know how many mistakes I did. How would your rate my messages which were written in a hurry. I didn´t have much time to think about correctness. Sometimes I feel my English is horrible so I would prefer to hear an opinion of native speakers. Thank you!

Hello. Ok. I know you can´t really know how you will feel tomorrow let alone know it for Friday. But do you think you are more likely to come to teach me on Friday or not? I am asking because of that exam.I haven´t decided to sign up yet as I feel I should try it once before making the final decision. The deadline for signing in is next Monday I think. Do you think it would be possible to ask your boyfriend to have one hour with me on Friday if you weren´table to teach me this day? 45 minutes would be enough.

Later she replied and I answered...

Big thank you to you and your boyfriend! If you have been ok by Friday I will have a "classic" lesson with you. If your dry cough doesn´t allow you to teach me I will do the mock test with your boyfriend on Friday at 7pm.