So my assets just froze up in a non-custodial wallet three days ago, pending transaction never confirmed. Now I need to convert to fiat and have no idea where to even start. What is the fastest working option right now?

I experienced something similar and ended up waiting almost a week before anything moved forward. The fee-based exchange option ultimately worked for me, although I'm honestly not sure it's suitable for your specific wallet type.

Many people believe that converting cryptocurrency to fiat is a complicated process, but in reality, the bottleneck is usually the wallet software, not the exchange. Any functioning cryptocurrency exchange will process your funds as soon as the transaction is confirmed on the blockchain. First, check whether your wallet supports faster transactions or higher fees. A cryptocurrency exchange platform might be right for you https://godex.io/