My last 3 cycles have been 48, 45, and 42 days. Before that my cycles were btwn 31 and 36 days. I feel like they are slowly getting back to "normal" bc they keep decreasing. I'm not sure when I should OPK though bc of this.... I'm thinking I should start testing as if my cycle is back to normal but don't want to waste tests.... I was going to start on CD 15. Should I wait a few more days after that?