Anxiety or anything. Pleasehelp!

L.suffered with dizziness,head pressure and ear tinnitus started on Oct of 2024.i visited a neurologist and multiple hospital including cmc vellore.my mri is normal so neurologist said nothing.he gave meclizine and clonazepom.in cmc my diagnosis is b12 331 probable atypical meneiers and anxiety.i missed neurologist and psychiatry appointment in CMC ,but ent gave betahistine 48 for 1 month 32 for 1 month and asked for revisit neurologist said for mri contrast but i wasn't interested.i used only 16mg of betahistine daily and was okfor 2 months.i Even stopped clonazepom and good Sleep.but recently again I had dizziness and used betahistine 48 mg and had severe gas.now I'm experiencing head and facial pressure tounge stiffness and sleep issues.i also diagnosed with low vit d 18.2 recently.while trying to sleep some past will remember and that voice and vision is remembered  suddenly wake up from sleep. sleep is coming but this problem i can't sleep.usingclonafitfir sleepagain.pleasehelp