Struggling to even lose 1LB?!?! How to stop back pain ?

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Okay so my weight loss started on 1st January and so far 0% progress

Although I'm not a massive girl I feel quite big for the size I am weighing 190 pounds And 5ft 6 tall and due to my weight I have severe back problems I can't even walk fast without pain in my lower back

I'm a big lover for running but also can't do this anymore I can't do anything without pain and due to pcos even when I lower cals I don't lose weight unless I exercise a lot

I really need some tips on how to stop back pain so I can at least exercise because im getting more and more depressed about my weight everyday :(


Please help