Know how you feel in so many ways. I had an appt at the opticians yesterday and it looks like I might not be able to wear contacts any more at all. A big part of that, I'm sure, is down to my meds which I blame for making my eyes "extremely dry" to quote my optician. I have to wear my glasses all this week (fortunately they don't give me headaches like yours do) and then try to see if I can be refitted for contacts next week.
HOpe you get your glasses sorted. It took a good optician to fit mine - but I know it can be done.

Caroline