I am sorry to hear all these, bro. I will say same things as terobaaje, look for a bank and use the house as a colateral so that you can get atleast something for the bank. i exactly understand what your situation is b\coz i was in same situation a year back. it seemed like everything was falling apart but dont worry have a faith and patience things will work out. Tell you parents not to take any action in pressure ask them to be patience becauze i know patience works really good. As you have colateraled your house to your relative but not sold right, then you can try to use that house to get loan from different bank. i think you house should worth atleast 25 lakhs, so the bank will be ready to loan you atleast 10 lakhs for the house. I suggest you to be strong and be a pillar to you parents i know they are wearing down and are very nervous for the situation. Then to pay back i think the income made from your shop will be able to pay and you can send some from here too. You just need to have patience. I sure dude it works the only think is that you parents need to have a faith than crying for a help. Dont expect any relatives to help you because they will not. I dont know whether you heard this saying or not "Chan gedi sabai meri, chaina gedi aakhai tedi"
so instead of trying to ask for a help with relatives it wil be bette to make copiesof LALPURJA and MAP of your house and to visit rastriya and other private bank to get a loan. I hope this will help.
Lastly try not to sell anything right now as teerobaje said it will worsen your situation later and dont really skip school too because immigration is getting tough. Becareful. 
Have patience and faith the way will be led.
Have a blessed day
SN