90 lbs and Counting

So as of today I have lost 90lbs and I now weigh 100lb.  I actually didn't mean to weigh this little or to be this small.   I am a bit afraid I will go into the double digits as I am afraid to be too thin.  I am not a skinny fat person, I have a ton of muscle but at this point I must gain 5 lbs.  I will work on that.