Don't worry about that, iPhone stuck in recovery mode always happens when you update the iOS on your iPhone. There are two ways to solve it.
First is to put your iPhone in DFU mode.
1. Turn off iPhone
2. Hold down the power and home button.
3. When you see the Apple logo, release the power button but continue holding the home button down.
4. Open iTunes and wait for it to tell you that it’s in restore mode.

Second is to fix with a iPhone Data Recovery tool.
1. Fix the Problem of iPhone Stuck in Recovery Mode
2. Recover Data from your iPhone Directly
3. Recover Lost Data from iTunes Backup

I hope this can help you so much!