Okay... first of all, YES! Hormones and menses can and will affect what the scale and probably also what the ketosis testing says. Don't let water retention bum you out. It is not fat gained and will pass. Just keep drinking that water and you should be fine.
As for the ketosis strips, my best advice (though perhaps hasty) is don't use them. They are infamously unreliable and I don't trust em as far as I can throw em. Here are some things that can affect them:
-Exposed to air
-Exposed to steam
-Dietary fat
-Water intake
-Expulsion of ketones through breath, sweat as opposed to urine
-Just plain defective
That being said, pink is actually better than dark purple. Purple can mean you are dehydrated. Pink still indicates the presence of ketones, but they are diluted. That's good! Drink that water.
Are you noticing the other feelings of ketosis? Distinct breath, dimished appetite, etc. are also ways of determing the fat burning state.
Hope that helps a bit. The tea and macadamia nuts are fine additions and if you're not going above 25g of carbs a day, I assure you that you are in ketosis and will see results.
I wish you good luck. I'm sure you will do well.