5 year old lop ear rabbit is sick

My lop ear rabbit "Rodger" is having some problems. In the past few days he started with a very bad smell now he keeps tilting his head to one side, tear ducts keep crusting and he walks like he is dizzy and will not lay down to sleep like before. What can I do for him? I've had him for over 5 yrs and don't want to lose my very best friend. I'm disabled and living on disability and I cannot afford vet prices. Please help us.