Hi, I viewed your diary. I have a few suggestions and I did notice something that could be causing the drop. For keto you need to avoid spikes in blood sugar. About 2 weeks ago you started using mayonnaise with 5 or 6 grams of sugar (don't eat that) mayo should have no carbs. You also don't eat much. Get your calories up to at least 1500 most days of the weak, too little calories and your body will start to use muscle and you want it to burn fat for fuel. I think simply you are starving yourself. Also Sunday you had straw berry's and this can spike blood sugar. A few days you had 10-11 carbs (mostly sugar) in one meal. That's too many at one sitting. Your condiments should not ever use more than 4-5 carbs a day. Also avoid avocado if you want to stay in keto. My experience is that woman have trouble with it.