My husband and I were not so careful when celebrating our five year anniversary which so happened to be 14 days past the first day of my last cycle which i typically ovulate around this time (based on my two children conceptions). I took plan b the following day about 20 hrs later and within that 24 hr timeframe, the only symptoms I had was fatigue.

A few days later I started to have slight random cramps but no period. Is this normal for plan b or could it be implantation? 

I'm going to take a test as soon as I can to be sure but was curious as to others thoughts?