Hey girls!
Petals, good that you're starting to temp! Usually you will see your temps be low-ish around AF and before O and then spike after O. Some people have a giant spike while others see a gradual rise. Once FF sees an overall rise above your cover line (your average temp) for 3 days, it will usually put crosshairs on the day it looks like you O'd. Then if you start AF, your temps will dip usually a day or 2 before AF or sometimes right on the day you start. You can click on my chart and look at mine for examples. Don't look at this cycle's chart though - it's crazy messed up because I had a kidney stone and surgery and my temps were all over the place.
Marie - I have read that sometimes OPK's can pick up other hormones that can cause the line to darken. Looking at those pics, I wouldn't call any of them positive. Positive opk lines are equally as dark or darker than the control. The one or two that are kind of dark could have been from other hormone surges going on. My feeling is that you probably haven't O'd yet. What CD are you on now? And how long are your cycles normally? I forget.