Letrozole 2.5mg

I started taking letrozole this cycle. Supposed to take from Day 2 to Day 6 . But I didn't take letrozole on Day 5 due to food poisoning and I took it on Day 6 instead. But I didn't take the last letrozole tablet as I was down with food poisoning again. Overall I only took 4 tablets. Didn't complete my letrozole dosage.

Few days ago I had lots of creamy discharge. But now I'm quite dry. Ovulation is in 2days time. I'm not sure if the letrozole is effective or if I've ovulated already or not yet. Help ladies. Anyone with similar situation ?