I have dizzy spells but not horribly bad like you say yours is.
I think you need to get checked out incase it isnt panic attacks.
If it is you could be causing them by thinking about the dizziness too much
I agree with Donnie. go to an ENT first...however, I had a dizzy headache for 6 months straight...I had MRI's CAT scans, went to neurologists, allergist, ENT...EVERYTHING!!! Mine ended up being anxiety and depression. I see that you had a major life change (your marriage..CONGRATS!) sometimes going off meds at any stressful time, good and bad, is not a good idea. Even though the wedding is over, there are still many changes in your life. I feel you may need your meds at this time. However, it can also be done without them. Try a therapist. It may help.
I forgot one more thing - what about your blood pressure, blood sugar, etc. You can also ask your doc for a blood panel to see if something shows.
Donnie
Please let me ask a question as I know that anxiety can cause some dizziness. The question is that were these doctors like an Ear Nose and Throat Doc ? I don't want to alarm you, but gently say that maybe it might be something like an inner ear problem or vertigo. Usually, it takes a specialist to find out these things. Ofcourse it can be anxiety, but I would like anyone else would find an ENT specialist and mention to them about your medicine history. It can be difficult to find a "good" doctor that is willing to take what ever it takes to discover your problem. I know that dizziness can be terrible - please check out a good ENT for inner ear problems.