Nexus 5 in bad boot loop

[AC Question]

So as it says in the question, i have a nexus 5 and its stuck booting up. When i turn it on it says google then turns off. sometimes it gets the the circles but never further, It started off not being this bad, i was able to re-rom it and that didnt help so i rommed my first backup (factory) and this didnt help. When i boot into recovery it just turns off again, any ideas what this could be?