I Had Sex Yesterday, And It's Somewhere Around My Ovulating

I had sex yesterday, and it's somewhere around my ovulating day. My boyfriend used a condom but we suspected a leak, therefore i decided to have an ipill just within an hour.
Questions i have are -
1. Does i pill work when i am ovulating?
2. What are the chances of getting pregnant?
3. What are the side affects i could face? It's been 12 hours from having the pill and now i'm dealing with some white mucus like discharge. Is it normal?