I doubt it has anything due to your weight unless you truly are over weight and that has predisposed you to gastroesophageal reflux which makes vocal cord problems more likely. Stridor, wheeze… these terms mean a lot to doctors but when patients hear any abnormal sounds with breathing they tend to call it “wheezing”.
Again, if you can hear it then it’s probably from your vocal cords. But I think it’s worth it for you to see an ENT who could scope you when you have symptoms to evaluate further. It helps if they have a good speech therapy team that works with them.
If you live anywhere near to North Carolina I can help you get set up with all of this if you desire it.