ARRRRGH

I just need a shoulder-thump/slap/cuddle 
About 5 months ago I began a health campaign, with the help of a therapist. I eat the most insanely healthy diet, took up running, and swim miles a week.
One of the problems I had to tackle was to stop weighing myself. I would weigh myself, lose 1lb and chortle then eat a pie
, or gain 0.5lb and go into absolute meltdown. I mean, serious meltdown. Which would then make me eat pies.
The therapist has helped me so much. I don't weigh or measure myself but focus on fitness goals and clothes.
Here's what's happening (in 5 months)
I can run 5k a couple of times a week
Friends say "Dear God you're looking skinny'
My Mum worries I'm looking gaunt 
I bought my first pair of jeans (size 20!) 6 weeks ago. I can now get them off without undoing them.
Dresses that haven't fit in 5 years are starting to look loose.
On a whim, I took out the tape measure. Surely, right, SURELY TO FUCKERY I WOULD BE SMALLER
No. I have the SAME FUCKING HIP MEASUREMENT AS 4 MONTHS AGO
I have just completely freaked out and feel like I am back at square one, mentally. I want to lie face-down in some lard, burn my running shoes and give the fuck up.
So either everyone is suffering some kind of mass hallucination, and I'm just the same as I always was, or it's possible to loose a significant amount of weight/bulk and still have the same hip measurement.
What the fuck. I apologise for the sweary rant. It's just after working so carefully on twenty years of weight issues I really thought I was getting somewhere, mentally and physically 