Should i go to a doctor or are they going to dismiss how i feel?
Go!!
Switch docs till you find one that fits and helps. To reduce switching, try to research possibly good ones beforehand (online, people you know). Get yourself revved up to advocate for yourself and help you take any possible dismissal in your stride, or get someone to support you doing that....
At the same time, try to find out yourself by describing and tracking the symptoms and possible triggers, and use what youtube physios suggest to identify possible treatments (if it helps) and possible triggers (if it hurts) until you have a toolbox.
And parallel try out various gentle manual therapists of all kinds, cos they can help without diagnosis, and a diagnosis will often not get you the help you need.
My ideas:
Leg pain may well be from the back and/or neuropathic. Is that possible?
If it's at night rather than from walking, it should pay to try out different mattresses, adjust your sleeping positions with pillows, get up at night,
try to find hurting spots incl. trigger points that radiate on your legs and back and find stretches, use a massager etc. on them...
The dizziness may be connected or independent, you could try to find that out. Docs can't help much with these sort of observations.
(I was in hospital for vertigo for a week in August, and they couldn't help, suggested blood pressure, just cos it was high. By analyzing I found out it will have been a combination of a very painful bladder exam, a mid-term neck pain, sitting twist-stretched too long to one side. They recommended blood pressure meds, but I've now found even 3mg of it is sending my blood pressure too low, as my cardiologist says.)