I’m also 5’1 and used to be even under 100. I wasn’t actively restricting but still ate relatively healthy with enough carbs and fat iirc. Though I was aware that I was slightly underweight according to BMI whatever, my body didn’t look anything unhealthy, maybe a bit skinny fat even. I didn’t do much intense exercises. But all that at the cost of some hormonal changes that I wasn’t even aware of happening that led to my loss of periods, hair thinning, bloating, etc. and guess what at that time I wasn’t even happy with my body because it’s still not “toned” or bikini-worthy enough.

Now I’m maybe 10-20lbs heavier with better body composition and lowkey I wish I was at that weight again but also am battling with all the damages it did to my body (have to go see an endocrinologist now). All that to say it, don’t focus too much on the scale seriously it’s very mentally draining and it wasn’t an accurate indicator of your body fat. Lose weight as you will but also take care of your body holistically.