Possible late O?

I am really getting frustrated with my chart this month. I started antibiotics on CD7 for a kidney infection and finished them on CD17. I usually o on cd14, but still nothing according to my chart . I have been extra wet this month probably due to the antibiotics and the extra fluid intake due to the infection, but now I am afraid that I won't o this month. Has anyone else experienced this? My positive OPK never really got super dark but my urine was not super concentrated either so I thought it was due to that. Any advice? Do we keep BD?