Will My Eyes Adjust To Glasses With Only Small Periods Of Wear?

I just got my first pair of glasses in 7 or so years and my first pair of glasses with a lens for astigmatism (yes, one – I only have it in one eye).
I put them on and the world is a bit warped. I found that this is due to the astigmatism. When I do wear them, I feel dizzy and my eyed feel a bit strained, although I can see better than I do with contacts in.
What I’m wondering is if this strain will get better with time even though these glasses aren’t full-time for me. I put them on after my shower and I’m usually up for five or six hours following that shower.
Last question is when I do adjust to my glasses, will my contacts be fine still, or will I have to pick one and stick with it? Although I like the clarity of the glasses, I’m a photographer and I really don’t want that lens getting in my way when I’m taking photos.

If You Have Astigmatism, Can You Wear Contacts For Long Periods Of Time?

I heard that it gets irritating to wear contact lenses designed for astigmatism, if you wear it for long periods of time. Is this true?