starving to a binge. what is going on now??

I’ve always had eating problems, but for the past 2 months or so it got extreme. It was jumpstarted with running approx 6 miles every couple days and not eating much, which made me lose weight. I saw I was loosing, and it snowballed. I more or less stopped running, but I hardly ate at all for a good month and lost about 20 pounds. I stopped getting my period. I’m 5’6, I was 130 and last week was (at my lowest) 106. I was probably 110 two days ago. Everyone was(is) worried about me, so I came to my parents house the other day and decided, what the hell, if everyone wants me to gain a few pounds, then I can treat myself. Long story short, I binged quite a bit and feel like I gained so much! They took my scale away (I compulsively weighed myself) so Im not even sure how much I gained, but if I were to guess I’d say I’m comfortably sitting at 115. Thats (at least) a 5 pounds gain in 2 days. I’m only guessing since I dont have my scale. (which is driving me nuts) Today though, my dad once again told me how I look like skin and bones, and all I could think was “oh my god if you saw my stomach right now you could not possible say that!” I feel like everything went straight to my stomach. Before my “binge” my hip bones protruded a lot, and now even when im lying down they are barely noticable. (2 days!!! did I really eat THAT much??) I know a month of not eating isnt comparable to anorexia, but I’ve been told it is common with “recovering anorexics” that weight gain goes straight to the stomach. Is this true? I feel huge, and like I’ve noticably gained so much, but I still fit in my size 3 jeans, so Im so confused on what is happening. (during my weight loss, I was only just starting to be able to wear a 3 but still mostly just wore 5s, and when I went to the store today, the 3s all fit perfect.) this is confusing because I can physically tell my stomach has gained weight, but why do these pants still fit??
I went for a run today, and am going to for the next few days until I am able to start my cardio boxing classes on wednesday. I’m hoping this will help. My question is really.. is this all in my head? And if I really am 115 lbs why am I seeing myself as so fat!