i felt exactly the same way. felt tripping off but it was just a feeling. it usually happens noght time. good thing its not coming back in the morning.
"Is it the stress? the anxiety? or my ears?"
Dizziness is a classic symptom of anxiety is general - and panic attacks in particular. Poking around in your ears can also cause dizziness and balance problems - especially if you've given yourself an ear infection. It sounds like you have been going through a lot lately, and you are on a relatively low dose of anti-anxiety medication. It is quite likely that your dizziness is coming from the breakthrough anxiety / panic attacks you have been experiencing. Also, not eating as much as you used to could cause this as well. It is important to see your doctor when any new symptoms pop up (or if old symptoms get more intense), but based on your age and history, brain tumor, heart failure, and seizures are unlikely caused. Dizziness is rarely the sole or presenting symptoms of a brain tumor, and clonazapam is actually an anti-seizure medication. Dizziness can be associated with low-blood pressure, so if your heart is racing during the pain attacks, it is unlikely to be heart failure. Only a doctor can tell you what's going on, so go get a check up to make sure everything is okay. If the dizziness gets out of control (or other symptoms come up), go to your nearest ER to get things checked out. It sounds like you might need more help in dealing with your anxiety / panic. Are you seeing a therapist now? If not, therapy should be very helpful in finding new ways to cope. You might also need an adjustment in the medication you are taking.
All the best..