I don't have amy space left on my iphone?

I only have 12GB iphone and it says that I've spent 2.1GB on my photos but i don't have any picturs on my photos. I need help guys. What should i do? Advance Thank you for your answers

Go to your File Management and try to check the Photo file and even if you find your deleted photos there, delete them. And try moving your apps to your SD card

Upgrade to Note 4/5, S5/S6, LG4, Z5, Moto Pure.