plan b weight limit?

So I took plan b two nights ago after a condom breaking, and found out today that there is a weight limit of 165 and below. Have you ladies had experience with this? I am over 165 pounds and am freaking out.  will it still work? 
Also, if it will work, when should I expect to get my period? I'm trying to wait patiently but I'm freaking out. 
I took the pill on the 31st day of my cycle, my period was a couple days late already, and still no sign. However, I just stopped birth control last month which is why I think my period is late. What do you guys think?