Delay ovulation

Maria
Hi! I am in my CD11 and everytime that i test for opk, it is negative. I use both clear blue and wondfo. My cycles are usually short ( 26 days). However, i had a sinus infection that made me had fever for a week. Currently, i am taking Azythromycin. Can my sickness affect the delay in ovulation or a surge in LH? Gunce any suggestion? Thanks