Levonelle morning after pill HELP PLS

So me and my boyfriend had unprotected sex two weeks ago and I got the morning after pill the day after. It was the Levonelle type from boots. I had no side effects up until now (I hope these are side effects and not failure of the pill). I've been extremely fatiqued and slept about 24 hours in two days, I've also got the most unbearable sore breasts and feel generally ill. Has anyone else had a delayed reaction to the morning after pill or should I take a test ?