[Routine help] How to take doxycycline without getting nauseous / throwing up?

So I recently started taking doxycycline again after a week long break because I ran out of supply and wasn't able to coordinate a dermatologist appointment until 7 days later.

I restarted my 100 mg a day routine with doxycycline 2-3 days ago and it was going well. I took it today, and then 30 minutes after taking it I felt incredibly nauseous and threw up.

I'm starting school in 3 days and I was wondering what I could do to avoid getting nauseous and throwing up in school.

Are there any tips or things I could avoid to make sure that this doesn't happen while I'm in school? Thank you!