In the worst case scenario, if fish rug, it means that the exchange has been compromised and all of the digital assets, including your LP tokens, have been taken. Unfortunately, there is no way to get these tokens back as they are now in the possession of the malicious actor. The only thing you can do is to contact the exchange and report the incident and hope that they are able to recover the stolen assets. It is important to note that this is a very rare occurrence, and most exchanges have security measures in place to protect against these types of attacks. However, it is always important to be aware of the risks and take the necessary precautions to protect your digital assets.