I'm so sorry to hear that things haven't improved yet, but it's probably still early days. Hopefully, things will soon start to get better.
As others have said, some people do seem to need both topical AND systemic HRT to overcome VA issues (this is what I'm hoping will help me) but I get the impression this is a minority - for most women, the localised estrogen seems to do the trick, although I know even for them it can take a while.
I know all this isn't much comfort to you at the moment, when you're feeling so dreadful. It is truly horrible and I know that your daughter's wedding being so soon must be causing massive stress (which in turn just makes the symptoms worse).
I know I keep banging on about AZO (I don't have shares in the company, honestly!) but would it be worth a try, just as a very temporary, one-off measure? I'm just thinking that, if you tried it in advance of the wedding and knew that it would help you get through the day, it might help you to worry less about it. I'm always very reluctant to try new drugs or remedies, so I took a tiny amount to start with as an experiment then built up to the recommended dose once I knew that I'd had no adverse effects. I'm due to go to the British Grand Prix at Silverstone in July (much anticipated, but nowhere near as important as a wedding!) and knowing I can use AZO if I need to is very reassuring.