Do not Google symptoms. Period. You can't diagnose yourself. The same symptoms can be a part of a thousand illnesses or none at all. It's not a bad thing to research something you've been diagnosed with so you better understand it and better understand if your doctor is an idiot, but that's after the docs give you something to go on. The fact low iron is common in your family doesn't make it any less low iron, by the way, and low iron can cause problems. All you can do for now is wait for all the tests to come back, see the proper specialists, and see how that goes. Trying to play the what if game on your own will just drive you nuts at this point.
This does sound like an anxiety issue. I've suffered health anxiety myself. You become so hyper aware of everything in your body. You've done the right thing to rule out any actual condition causing what you are feeling. Don't be afraid of the results. If they do determine something, they will treat it. But there is a strong chance that the actual issue here is anxiety. Then you are left with working on what to do about that. Everyone feels anxiety from time to time. It's normal. But if it impacts you in a way that you can't function well? Then it's time to take action. A therapist can help you with coping skills. I'm a fan of these. It sounds like your lifestyle is good. Exercise and eating well along with sleeping helps! A therapist can give you the added intel to deal with feelings of anxiety better. And medication, if needed, can further provide benefit. That's up to you for whatever you, your therapist and doctor decide. :>) The important thing is to help you FEEL better on a regular basis.