I don't know if your question was answered on the hpv forum but you should get tested. There is no minimum or maximum time frame - it usually takes at least ten years for cancer to develop but it can take less.
On your second question, I think this can happen as a result of VIN1, a pre-cancerous stage in the development of vulvar cancer. It doesn't always progress, but you should have it looked at - the earlier the more likely they are to be able to treat it and prevent it developing further. Note: this type of condition is nothing to do with the cervix and so would not show up on a pap, but is just as dangerous so please get a gynbaecological exanination as soon as you can
this question would be much better asked in the hpv forum.
thank you.
grace