Flu delayed ovulation

Been charting for a while now, and normally get a positive opk anywhere between CD15-CD17. Cycles range from 29-31 days.

So I had the flu from CD6 to CD12 of this cycle, and didn't get my positive opk until CD22! Honestly thought my ovaries were on shut down this month. Temp spike today at CD25. no idea if this will be a normal tww or not...