Tried sending btc from https://blockexplorer.com/address/1Kefj9Sca7ZRvGhxRi9LcnPJjCGYC8kkcQ to the address of https://blockexplorer.com/address/1CV3PFdb8ssf88fhpQDHtSBoH9Tts95ajs

Was my fee too low? How to get my btc back? This is the first time it's ever happened before and I'm worried about losing my btc that it will never confirm and just be stuck.