Chelsea, everything points towards it to be an ammonia burn, especially if it starts to go away, due to the water changes you do and ammonia to disappear.
I strongly advise you to get a sample of your water to the petstore and get it tested and post the exact results on here for me, please.
I am sorry I didn't think about this opportunity to have your water tested... perhaps because I do it by myself... just didn't come into my head
