Je m'inquiète pour ma santé, je suis malade depuis 4 ans que dois-je faire ?

this is my first post ever and a lot has been going so I apologise for the rant . I have been experiencing multiple worrying symptoms for the past 4 years but I will list the main ones I’m having.

random dizziness
mild vertigo
loss of appetite
brain fog (cant remember small things i used to)
body aches and pain (All across my body)
bone pain (deep, throbbing)
chest tightness (feels like I’m having a heart attack)
localised head pain
ear fullness and popping
gastrointestinal problems
tingling and numbness in feet and hands
anxiety
insomnia

There are many more I can name but these are the main ones. I’ve been going to the doctors on and off for 4 years and the only thing they’ve done is a full blood profile (CBC, thyroid, vitamins, CRP, kidney, cholesterol, bone profile, liver). ultrasound of abdomen and chest x ray came clear. The doctors don’t think the symptoms I’m displaying is worthy for a CT or MRI scan. The only abnormal result is vitamin D which came back as 19nmol /l or 7.6ng/ml. Are all these symptoms really due to a vitamin d deficiency? I’ve been taking 2 X 20,000iu D3 a week for 2 months but have not noticed any difference. Is anyone else going through this or am I alone?