It certainly is OK to skip a workout once in a while if you don't feel up to it. Many times, though, I feel better after working out.
As a side note - Yaz has been in the news for years with lots of side effects. Please be sure to stay informed while on it. My DD was on it for a few months and after a long talk with her doctor, switched to something else. She originally chose it because it is very effective for lessening sever PMS and also helps clear up acne. Just be careful.
Life style change started on Jan 13, 2011. I was going to lose 100 pounds by Christmas.
I lost 93 pounds by Oct 1, 2011 and am holding there for now. We'll see what happens.
New goal: To maintain at about 160
Final Goal: To decide if I need to lose more
Just Keep On Keepin' On