Help it's a weight gain one

[ElonMess]

Argggh!
I lost 4 stone in 2 years using MJ and NutraCheck calorie tracker eating below 1,200 daily for 2 years. I was obese then I was healthy.
I stopped MJ in March and since then I've gained 2 whole stone exactly.
I want to get it back off again urgently, but here's the thing. I've looked through my weight loss log and it shows me that if takes me a minimum of FIVE MONTHS to lose one bloody stone! Mimimum of 5 months!!!!!! That is insane.
Looking at my weight log history, it took 5 months to lose my first stone. Then 7 months to lose my second stone. 6 months to lose my 3rd stone. And 6 months to lose my fourth stone.
WTF???
That was on 1,200 cals a day for 730 days straight! Plus MJ weekly 2.5 up to 15mg.
Plus swimming and walking and body pump.
Jesus wept.
That is abnormal isn't it.
What is wrong with me????
Actually seriously what is wrong.
From a 52 year old 5ft 8 blob.
God damn it's going to take me a shitting entire YEAR to get this 2 stone back off!!!!😫😣😓😭😱
P.S. I know mumsnetters love to advise blood tests so don't worry I had the lot and they are all normal including TFT.

Have you looked at the TDEE calculator to see what calories you should actually be eating? less than 1200 a day is very low then when you factor in exercise you may have been netting around 800 calories which just isn’t enough and has the opposite effect.