OPK peak day vs cycle length

Last month I had a 32 day cycle. That’s on the longer side for me. I just started testing this month. According to the kit I shouldn’t start testing till day 16, but I was afraid I might miss it since 32 days isn’t my normal. I started on day 8. As of day 14 I haven’t seen much of a change at all. I increased the number of times I was testing in a day as I got later in my cycle. Does it have to be a gradual increase or can it just peak one or two days? I’m also curious what’s the latest some of you ladies have ovulated in your cycle? I’m starting to worry a little that I’m not ovulating this month. Here are my strips so far (not including today, day 15, since I’m just getting up). I’m grateful for any insight!