I'm so confused! Pleaseeeee help me!

Is it possible to ovulate more than once in a cycle? I ask because on 3/30 I had a peak opk smiley face . Then 4/1 and 4/2 negative then 4/3 I had a peak smiley face again!  My AF is due 4/22.  When should I start taking a pregnancy test? 😰