Would my doctor schedule me for a colpscopy if she thought I had herpes? Wouldn't she just say I need a herpes test I see sores and blisters?

Yes. Having herpes or suspicion for it increases the possibility of having hpv as well which can cause dysplasia of the cervix. It is wise for your doctor to take a close look at your cervix and make sure all is clear in this setting. A colposcopy also give a good look at everything to make sure all other things are clear. Go for it.