I hope you've got all your data back from this micros SD card.
As I know, in your case, you really could give the USB card Reader a shot and disconnect it to your computer.
If it could be read functionally there, simply copy off all your saved data on the card and format it afterwards for fixing its problems.
But, unfortunately, if this SD card still gets the same "not formatted error" problems, this card may really get some problems.
In order to get back your data, you'd better not save anything else on it and then download a SD card data recovery application to take chances.
If you know nothing about data recovery stuff, you could firstly try some SD card data recovery freeware available online:http://geeksdo.com/freeware/data-recovery.html
I hope you could find a proper one to save all your needed data back.
In the future, you should always remember to back up everything important on separate locations.