Confused ?

TTC baby #1 and my first try at using an opk. I am using the Clearblue Digital version for the opk. I am on day 11 of my cycle. I started using the opk on Monday and the first three days I got a "low" result. I took first thing this morning and got a "peak" result, which means I should be ovulating. According to the calendar and other apps I'm using, I shouldn't be ovulating until Monday. I'm just alittle confused as to which is correct! I went from a "low" result and jumped right to "peak," without ever getting the "high" result that you are suppose to see when you first enter your fertile time.  Which predictor do I go with, the opk or the calendar??