I think I have lost my personal and business data on my memory card. When I connected it to my PC, it is always asked me to format this card. And I have pressed it in a hurry without thinking it carefully. Now, all the saved data is lost. Can you give me some advice to get back my data?
Thank you in advance!

Sorry, but the data is gone if you formatted the card. I would never use a memory card for my sole storage medium. A memory card is used to make data portable, but you need to back up regularly to more permanent media.