I would certainly be going back to the Doc, in your shoes.
But, I would also make further comment:
If you went to the Doc, having lost weight then modified your carb and fat intakes, what did you do to replace those calories? Even if your weight had been holding steady, dropping carbs and fat is likely to result in a calorie deficit, if you aren't eating plain old mounds of what you continue to eat.
I am 5'2" and weight 47kg, so pretty much as you did 6 months ago. I am pretty slight, so you must be very slight indeed.
When diagnosed, I concentrated on regulating my bloods by reducing carbs and no longer eating low fat products. I didn't try to reduce fats (despite having higher than ideal cholesterol), but nor did I increase the fats I ate. The weight fell off me! So, I can imagine your dietary strategy could be having an impact on your predicament.
When I wanted and began to need to stabilise my weight, I firstly started consciously eating a bit more of everything I was eating, but that wasn't enough. Cutting to the chase, I ended up having increase my fats a little.
But, the fab news is that it is becoming understood that cholesterol isn't governed by fats, but by carbohydrate, so if you are trying to reduce your cholesterol (and maybe get back off the statins), then it's carbs you need to concentrate on.
In your shoes, if my appetite was satisfied by the volume of food I was eating, then I would suggest just adding a knob of butter to your vegetables, or having a few nuts. I used to have a few nuts at the end of my lunch, as I was experimenting.
It can be a real juggling act to begin with. See the doc again, but please do think about whether you are actually eating enough.
Good luck with it all.
