STOPPED THE PILL, CHANCE OF PREGNANCY?

I have been on the pill for about 3 years. I stopped taking it because it causes me to be very depressed out of no where. I hated me emotional toll that took on me.

I finished my last pack all the way through, and had withdrawal bleeding like usual during the placebo week. I was supposed to start a new pack Sunday the 25th aug. I didn’t, and it is now Thursday the 29th aug. So I have missed 4 active pills as of today.

I had unprotected sex on Wed. the 27th. I had only missed 3 active pills that day. Is is possible for me to ovulate so soon after stopping at the end of a pack?

I really want to avoid a Plan B if not necessary. Also I will be using conforms from now on because I am aware I can begin to ovulate within a month.