Yeast Infection vs. CM?

Hi, Happy Holidays!!  I am taking an antibiotic for a sinus infection and that always gives me a yeast infection.  I havent taken anything for it yet. I am trying to battle it w/ acidophilus and eating tons of yogurt.  Problem is:  I had the methotrexate shot on Nov 9 and havent had a period yet.  My dr said I should expect it anywhere from last week of December to second week in January.  Well, I didnt see signs of ovulating last week and of course if I am ovulating now I can't tell by the CM cuz I have some other **** going on.  Can I still ovulate if I have a yeast infection???