iPhoto won't import photos from iPhone

So basically I have been stuck for the last two hours.

Connected my iPhone 6 to my MacBook Pro using the USB cable as always, and opened iPhoto to transfer my photos and videos. Got a notification saying that there were no new images to import, yet I have 400 new photos and videos I need to get rid of to clear up space on my device. I tried using my iMac and got the same message. I then tried my brothers MacBook Air, and even my parents Windows computer + my school computer, a crappy Lenovo, but I kept getting the same message that there were no images to show!

I tried downloading some apps to transfer them but nothing worked.

I have restarted both my mac and my phone several times and tried to connect and disconnect, restart iPhoto several times etc. but I keep on getting the same, frustrating message!! However when I sent some of my photos on facebook messenger a few of them appeared, so I have been able to transfer maybe 10 or 15 photos, but not any videos and I haven't been able to transfer any more photos this way..

I really have no idea what to do next, iPhoto has never been this messed up. Yet since I get the same message on several computers I'm guessing the phone is the problem. Does anyone know what to do?? I'm leaving for Canada tomorrow and I really wanna free up some space for more music etc. for the flight...