Oh crap, I wish I could have been more helpful
Things may seem hopeless to you but there is still plenty of things you can do and still plenty of hope.
Maybe you should talk to your doc about getting some meds for the depression and pain relief.
If you're feeling unsafe you can always call one of those crisis lines. They are usually a free call and are quite helpful. What about support groups? Are there any in your area? Maybe asking a doctor, social worker, church minister or forum moderator or doing an internet search will help you find a group near you. There should be plenty around. Just to get out and meet other people that understand what you are going through and to know that you're not alone definately helps. You can also go to yor local library and borrow a heap of self help books which won't cost you a cent and they are really helpful too. You will find self help books in a secondhand book store and they are usually reasonably priced too. They are great just to have there if you need to refer to them later on.
With the stress I find that Valerian tablets help and so does Camomile tea. It has a nice taste to it and is very calming and soothing and has no caffeine. The Valerian and the tea reduce stress which in turn should reduce the frequency and severity of the headaches. I'm not sure if you have it where you live but there is a painkiller called Aspalgin which is an aspirin-codeine combination available at chemists and it gets rid of migraines quickly too. I find it helps when you take the tablets at the first sign of a migraine before the pain starts, it usually avoids the migraine altogether this way. I learnt this stratergy from my aunt who has been getting migraines for most of her life. Nurofen also make a product called Nurofen Migraine. I haven't tried it but it is available at supermarkets here.
That sucks about the housing situation. Can you apply to get into public housing? They usually have a waiting list based on need and if you tell them you have only got temporary accomodation with the in-laws and that they are making you move out they should be able to help you. Tell me if I'm way off the mark with the in-laws stressing you.
Is this of any help to you? I hope it's more useful than the last advise I gave you.
Take care and let us know how you're doing ok?
Love Nathan xo