Clip question

[Nat]

Hello Gentlemen (and ladies).

I am new to the world of semi-automatic pistols. I recently purchased a Beretta 92 FS. I have two clips with the gun. I want to load the gun for personal protection, but I don't know how long I should leave a clip loaded. Will the bullets compress the spring to the point that the clip will not feed the bullets correctly if I leave the clip loaded too long? How long do you leave your clips loaded before switching to another clip?

Thanks in advance for your responses.

Nat