Oops, well done on getting out of such an anusive relationship with such an awful man. You are obviously really strong. :)
Please get yourself to a doctor. Your body has gone into 'starvation mode', because you're eating much less than you need.
The average woman needs about 2000 calories a day. The lowest recommended amount is 1200 calories. A tub of hummous contains 300-500 (depending on whether it's low fat or not) and celery and lemons have none, so unless you're eating 4 tubs a day, you're not getting anything like enough, and you're not getting all the nutrients you need either.
I have a friend who stopped eating much after a trauma. She developed sores and her periods stopped, too. Then she developed dizziness and headaches. Then depression. Then joint pain. Then she lost a tooth. After about a year, her kidneys nearly stopped working, and she was hospitalized for several months.
Also, be careful it doesn't back-fire for you like it did for me: I lost a lot of weight after the end of a relationship, like you. In my case, my weight loss was much slower - 95kg to 72kg over about 9-10 months... And I wasn't really restricting my food, just exercising and being happy (for a change). But I still developed rickets and anaemia, and ultimately it back-fired on me badly because I couldn't exercise due to exhaustion and joint pain... And I regained all the weight I'd lost, and more. :(
Look after yourself. You deserve it. :) Don't let that twunk have any more influence on your life at all!