Can you stop yourself from catching a cold?

I’m so scared right now. For months now my boyfriend and I have planned our Spring Break trip to Disney World. Everything is paid for and our flight leaves in exactly one week. However, all day today my throat has felt really weird/scratchy like it always does before I get sick. I CAN NOT afford to get sick before/on this trip. I have a ton of projects to do so I will be running around all week and won’t have a bunch of resting time. Is there any way I can stop this now before it evolves into something awful? This is such horrible timing…..