Chronic fatigue, brain fog, joint pain, throat and lung irritation…?

I am 26, 5 foot 10, and currently my heaviest weight at about 225 pounds. My main complaints currently are chronic fatigue, brain fog, joint pain, throat and lung irritation, weight gain, dizziness, stomach cramping, too frequent bowl movements, and issues with my eyes feeling irritated. I can maybe connect it to getting sick back in 2014. I got a really bad fever, and was throwing up for a few days while I was on a vacation. I never saw a doctor since I was out of town and most symptoms passed quickly. But when I got home, I was teaching at a summer school and I was SO TIRED all summer. I would almost fall asleep during lessons, and I would have to take a couple naps a day. I had really bad joint pain all over, especially in my hands. I think it slowly just got better but it feels like I have never been the same. I am wondering if I got mono and it is still in my system? I have tried going vegan, gluten free, dairy free, doing anti candida diets, and most recently trying to regulate my pcos. Have not seen many results. Recently I am also gaining weight quickly even with changes to my diet and activity. Daily I am taking cinnamon, turmeric, licorice, berberine, chromium picolinate, vitamin B complex, vitamin d3, ashwaganda, Alpha lipolic acid, and a probiotic. Since taking these supplements, I have been getting strong waves of nausea, dizzyness, and stomach cramps in the afternoon. I also had a couple weeks of spotting before my period.
I really just feel like I am a mess in all these little areas and any advice would be appreciated! I’d love to keep doing things on my own and naturally. But If I were go to a doctor what should I inquire about? What blood work should I possibly have done? Should I invest in a food allergy test?

Age:
Female
Medications: cinnamon, turmeric, licorice, berberine, chromium picolinate, vitamin B complex, vitamin d3, ashwaganda, Alpha lipolic acid, and a probiotic