Shell,
Your on the right track, don't google the sx and let go of overthinking the problem. It does feel like you have anticipatory anxiety.
Anticipatory anxiety is where a person experiences increased levels of anxiety by thinking about an event or situation in the future. The worries you experience specifically focus on what you think might happen, often with catastrophic predictions about the event.
Picturing positive outcomes can significantly reduce apprehension, which can lead to increased levels of confidence and an overall elevation in mood.
Kick that anxiety to the curb and let us know what the Dr. has to say. Let us hear from you.
Gentle Hugs,
Kitt