So just a follow-up for anyone who's been reading this and has come across the same issue as me, here's what a dropped transaction looks like:

https://blockchain.info/tx/709c8e5894b8eb55b4a7dcc222c88a000578dcb179a5dff06db40af7630a99cb

I was able to resend my bitcoin, but pheeeeew fees are high! Let's hope it goes through this time