Not sure if i should be posting here or in a medical sub so my apologies in advance!

I have noticed in the past that my anxiety can cause me to feel tired, foggy, nauseated, vomit, stomach pains, and diarrhea to name a few symptoms. Now I'm a pretty anxious person and though I'm in the process of dealing with it, it still affects my life daily. How do you differentiate between anxiety and a virus/bacteria? I feel ill so often that I've ignored symptoms and not gotten medical attention when I should have (ex. I once waited a week before going to the Dr and found out I had salmonella. TMD masked a wisdom tooth infection until VERY obvious. Dr not impressed I waited so long in both cases). Ive always been frequently sick and my family just assumed I had a poor immune system but there's nothing medical to back that up (I'm not immunocompromized but am vitamin D and B12 deficient but trying to remember to take my supplements). IBS doesn't make sense because the type of food doesn't matter really to my tummy symptoms. My TMD from anxiety/stress can mimics an ear infection to a T because of how it messes with my inner ear, so I've started ignoring ear pain, ear noises, and stuffyness; and just take vertigo medication as needed. Sorry for the rambling but when your anxiety causes so many ailments how do you decide when to seek medical opinions?

 Also I'm in Canada so medical cost isn't an issue because walk-in and health line is free but I don't want to come across as a hypochondriac and go to the doctor for every little thing. And anxiety too makes me put of going or calling but I force myself if I really have to.