Why am I always counting down the days and rushing time?

I’m literally giving myself a headache and driving myself crazy causing my own anxiety. I keep looking at the calendar and checking my email and examining on the calendar what’s the best day to send the email, then counting down the days until I get to send the email then when I do send it I check my email like every 5 minutes to see if I got a response yet then get anxious and impatient if they don’t respond right away. I’m driving myself crazy. Why am I doing this?!?!?! Had anyone else experienced anything like this?