You are far from losing. You are behind in tech, but you could get MT in 4 turns without going broke. Shut your science down afterward, and upgrade your riders. Take the Mongols or the Persians(Or maybe both) down hard for pointy-stick research. Cavalry is a huge breakthrough, and you have everything you need to get mean and nasty and carve out some more land for reseach farms. Persia would ruin your rep, so the Mongols look ripe.