Sweetner symptoms and conditions

when I was in my early 20's i got a sever case of bad acne! I was prescribed 100mg of Doxy 2 times a day. Of course I learned very quickly to eat before having it. Other than that no side effects. I had flawless skin for about 2 years, at which point i had built up a tolerance to it. When I noticed a few pimples I went straight to my derm before it got out of hand. My derm switched me to minocycline and after about another year of perfect skin I got off of meds all together. I have great skin now, just use proactive and nothing else.

Well now my 14yr old has started breaking out..nothing topical worked, I want to protect her from all of the emotional damage that acne caused for me. Put her on doxy 100mg 2x a day. Shes been on it for about 2 weeks and it seems like the big ones went away but there is an over abundance of small ones now and they are flaring up. Is that normal..I don't remember this happening to me but it was so long ago. Does it get worse before it gets better? Anyone experience this?