Health Anxiety

So I have had some unhealthy habits over my life. I have been, and still am overweight I have been through periods when my drinking can be borderline heavy just to give a couple concrete examples. Over the winter I am pretty sure I developed SAD and I started taking some supplements that might help with this condition. Saturday I had a panic attack that I am pretty sure was rooted in that health anxiety and I went to an urgent care facility just to get checked out. I One thing I had noticed was (sorry if this is TMI) is that my urine was a garish yellow color. In this case Googling it actually gave me some relief afterwards because it turns out that that is quite common when taking B Vitamin supplements. Sunday I was still feeling quite anxious though and found an online doctor and told them about some of my symptoms and the supplements I was taking they seemed to suggest that I quit taking them immediately. They also suggested that I find someplace that would give me a routine examination to see if I actually had an deficiencies. I don't really know why I'm writing this, just to see if there is anyone here who can relate, or maybe some advice for when I actually make an appointment for a screening, what to say and maybe even what not say so that the Dr. takes me seriously.