I would not wait a couple of weeks. If you can get in quickly. Im not a doctor or anything, but when my daughters h began to ulcerate it did so very quickly and was very painful. Hers had a scab like your daughter, which eventually broke down and began draining. Make sure to keep it clean because they often get infected which causes even more pain.
Katelyn mommy to two beautiful girls
Zoie Anna-Born with no birthmark on 12/7/2009. H appeared at 3 weeks of age. Had surgery on 5/10, and is recoveing wonderfully!