I downloaded the bible pay wallet about 7 months ago and went overseas.
I recently returned and tried to open my wallet today but it won't connect to the network.
Do I need to download a new wallet and replace the old one with it?
Yes you will need to download new version of BiblePay, there have been a couple mandatory upgrades since then,
You should be able to download and install new version on top of old version without any issues.
How to Update & Clean Wallet
https://www.reddit.com/r/BiblePay/comments/7nmvm8/how_to_update_clean_wallets/NOTE: Your "wallet.dat" file is your most important file, it has all of the keys to all of your funds. Make sure to have one or more backups of it.
Backup Wallet.dat:
https://www.reddit.com/r/BiblePay/comments/7lksp4/backup_walletdat/Ok,I downloaded the new wallet and let it sync last night....i woke up and it was synced but my computer was frozen saying i needed to delete some files to free space and now it just gets stuck on the block loading index screen when i try to open my new wallet. What gives?

My old QT file won't open now either. I deleted other files on my computer to free up space, so that's not the problem. Should i download it again?

I think the moment your disk was full the daemon corrupted some of your blockchain files. Easiest way to resolve this is to make sure you have enough disk space (the biblepaycore folder right now needs about 1.2 GiB), then do the cleanup again (as described above) and let it sync from scratch. Just remember to backup your wallet.dat and maybe your biblepay.conf and you should be good to go.