Is testnet down?

Guys, good morning. I am a new person in flow and cadence. I have created a NFT token and marketplace contracts and deployed in Testnet. From yesterday evening itself my transactions are not working. Earlier it was working fine. I even tried new accounts, it is not working. scripts returns the tokens in my nft collection. but my mint NFT transaction is not working. I tried transaction to send Testnet flow token to another account. it is also not working Any help would be appreciated. Thanks

Are you getting sore sort of error?
How are you running the transactions? Browser (js-sdk, fcl)? Server (js-sdk, fcl, go-sdk, *-sdk)?