Verb conjugation of "fix" in English

Regarding the meeting in early May: I could not reschedule the appointment at my daughter's doctor and I will definitely know if I can come during the first 2 weeks. I guess we should talk next week.
Somehow, my email was not sent. There were even a few mistakes, but really only minor things, nothing really bad. I've already read some other texts that you have sent and are getting better each time.
There are great museums if you like art. The most important is the Van Gogh museum. There are good restaurants and bars in the center, it is very international. I hope we can stay in touch.