What should you do if you think your prescription wasn't filled properly (shorted) but two weeks have ped?

I take Klonopin, and have for many years. Recently, I've been getting my pills in varying mg sizes, as I'm trying to taper off and have to break them in half or fourths. I just realized today that there's no way I could have had 90 pills in my bottle as is shown on the label. As I calculate now, it was probably 60, and pharmacy error. I've never had a problem before, so haven't been in the habit of counting my pills when I first get them. The clinic that dispenses my meds at reduced cost is closed until Monday for the holidays. I'm freaking out a little bit, rationing pills. How to handle the issue on Monday, though? Do I just go in and say, "Hey! I think you shorted my pills!" If it was unintentional, would they have a way of determining such an error at the pharmacy?