I’ve been using cheap opks for the first time this month so I’m hoping not to get too worried until a few months and I can see a pattern lol but I have a very regular cycle, typically ranges from 27-29 days with the odd month a little bit longer. When I tested this month my peak came on cd17 only leaving 11 days till my af was due to start. Looks like different websites have different number for what they count as an abnormally short luteal phase but just wondering what others experiences have been, should I invest in more expensive opks or is it a waste? Try and lengthen my cycle? (Don’t really want to mess up a regular cycle though)