If you have low iron and vitamin D, that could explain it all, depending on how low. It's most likely not your disc. Everyone has disc problems but they're not usually the cause of pain -- they have to be very bad for that -- mine are very bad. Only an MRI might tell you that, but even then, it's usually muscular. But we're not doctors here and you're reporting so many symptoms, it could be so many things. Not sure what you mean you have vertigo -- that's not a disease, it's a symptom of something else being wrong -- can be caused by inner ear problems, anxiety, and if you had it most likely alcohol would make it worse, not better, as alcohol affects balance. Do you suffer from anxiety? Because, again, this isn't the kind of stuff alcohol should make better. It's just a lot of stuff.
Look into seratonon shock syndrome and also, list ALL medications and supplements to identify interactions. Show a pharmacist or two they are great for this but you can cross ref meds and supplements online. Illicit drugs should also be considered if applicable.