Welcome to Gridcoin world!
Hive account@parejan is right, you will not lose anything until you have your wallet.dat and gridcoinresearch.conf files backed up. (And your password if your wallet is locked)
This is because all wallet app in the world stores all transactions since the birth of Gridcoin. But only those are able to open the specific wallet addresses who have the right files for it.
This means, you can install the Gridcoin wallet to another machine, and copy these files to there, and have the same wallet. Maybe it worth a try if you think you have issues with your wallet.
And you can check your current wallet status, balance, and transactions by copying your address to the search field at Gridcoinstats.eu
This is the beauty of the blockchain. Everyone can read the balance, and transactions, but nobody knows who owns the specific wallet.
You can also check there the current block count, if it matches yours to see if your wallet is really synched. (If not, it could be on a fork, but it's a more longer story ;)