I’m buying,Seller is trying to back out 20 days before closing!

[Nicole Rush]

Im buying my first home, we are in a legally binding contract. It is now about 2-3 weeks prior to closing, & the sellers are trying to get out. 

 What rights do I have? what do I do?

We have a newborn. We gave up our apartment and got out of our lease. So technically we're homeless. We also have a 10 year old and we are staying at my in-laws until closing. Making an hour and a half round trip to and from school twice a day. So mileage, gas. Not to mention storage, appraisal fee, inspection, HOA apps.
 

I need some guidance.

thanks