My partner left and now I don't know how to deal with finances

Hi all, this all seems a little odd to me, not something I have ever done before but here goes.
I am disabled and on Valentines day my partner of 5 years up and left without a word to examine why. I have a pituitary tumor and something called Ostiochrondritis desiccant, which basically crumbling joins which is in both knees and leaves me in constant pain and unable to sleep or consentrate for long, I get very fatigued very easily, I take fairly hight does of morphine every day and I claim EESA and DLA not sure if I am getting all that I can or where to turn to ask, I have been into my local job centre they gave me a phone number to call but they were not a lot of help or maybe I don't know the right questions, and help would be appreciated as I am worried that I will not have enough money to pay the bills and rent etc. This is all new to me as my partner used to do all this for me but now she has gone I am left with a big council tax and rent over payment bill and I am at my whits end. Again will be very grateful for your help.