So yesterday I did download the newest wallet from bitcoin unlimited that supports Bitcoin Cash, is still synchronizing 2 years and 48 weeks behind, I did send some bitcoin to this wallet straight from Coinbase yesterday, I did this to obtain some bcc free, I dont if I did something dumb, and now I am scared that I may lost my bitcoins
Don't worry about it. The only issue with the Bitcoin Unlimited Wallet (as far as I know about) is that it is very slow (in syncing) and it needs a lot of hard-drive space. But you don't need to get concerned. Your coins (both BTC and BCH) are safe and you'll be able to move them within the next 24 hours (provided your internet connection is fast enough).