I feel jealous over my wife's past experiences
You have been married for 10 years, so why are you feeling jealous about your wife's past? Are you feeling insecure?
I just want her to have been on my side from the start.
Your wife had her own life to live before you met and married, so it's normal that she would have relationships of her own before then.  You shouldn't be obsessing over things in the past if your relationship is strong today.
That's dumb. I'm going to follow her around the city and see what she's up to.
I don't understand why your feelings of jealousy make you want to snoop on your wife. If you trust her, you'll leave her alone.