@santoscarmina1674
Since then my weight has increased massively despite me not over eating.
Sorry, PCOS or not, that's not possible. It's basic thermodynamics. If you're gaining mass you're consuming more energy than you're spending. It's actually not a physical possibility.
So you ARE overeating. The good news is, it's a very common and very easy thing to fix - you are underestimating the caloric content of the food you eat.
The fix is simple: track everything you eat. Yes, everything. For a period at least, until you better understand what food is "worth" (calorically speaking). There are a million apps out there that make the process a little more than a nuisance.
Then just find your TDEE (google, I'm on mobile), eat less than that (you say you are morbidly obese so you can try a 300-500 deficit to start, then maybe dial it down to 200-300) and you will lose weight. If you don't you're either tracking your calories wrong or you miscalculated your TDEE.
As for exercise, if you're morbidly obese avoid high-impact exercises, like a lot of jumping, that will put significant strain on your joints and ligaments. You don't need them either - you're moving so much mass, and you are do far above the weight your body should hold, that pretty much anything that moves your body safely will work. Walk. Walking is massively underrated for weight lose especially if you're massively overweight. Just do some simple, safe, aerobics. Lifting weights is good too, especially as it will help you retain (and even gain) muscle, which will look and perform much better after the weight loss.
Goodluck!