Slipped condom! What to do??

Two days ago, the condom slipped up a little during penetration and some precum was bordering the edge of the condom. Then after he ejaculated, the condom was caught between my thighs.
This is the first time we've had troubles with condoms, so I immediately went to the pharmacy the next morning and took the morning after pill, just in case. It was within a 12hrs time frame.
I'm currently in the fertile window, so I'm extra paranoid. My period doesn't come till 14 days.
How do I make sure that I'm not pregnant?
If I turn out to be pregnant, what are ways to terminate it? I do know abortion pills is one way, but are there other methods? We're both adults but we're not interested in having children.
Also, what are some good precautions for safer sex in the future?
Thanks :)
Amy
This was the pill I bought.