[Skin concerns] Do I definitely have Rosacea?

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Is this definitely Rosacea ? Bit of a backstory, around may time I generally had a few spots over my face, normal teenage acne I reckon, one day I went into the sun for a solid 3 hours straight, no sun tan lotion, got pretty burnt over my body, but still had the few spots. Then came June and my mum thought it'd be a good idea to "get rid of the dead skin", so she said it would be beneficial to take (5%?) benzoyl peroxide and rub it into my cheeks and forehead pretty vigorously, which made my skin baby smooth, but also slightly red and a few more spots along with it. This was probs when my skin was at its worst. I had a dance about a week later and in all the photos, I noticed red circles on my cheeks with spots. Never thought much of it, just thought it was general acne. So I started looking into acne medications, went and bought zinc and vitamin a, they definitely helped. Start of July and I went to a festival. Very hot weather and lots of alcohol, never really paid attention to my skin but when I got home, my skin was good, maybe one or two spots, no redness, very tanned, so I thought the sun was really helpful to me and decided to hit the sun beds, twice in one week, got a nice tan. Skin continued to be very nice until I went to see the dermatologist, she told me I have acne Rosacea. So then I went to see my gp and was prescribed Soolantra. Been on it for three weeks now, seen an initial improvement and my skin is very smooth, but I have just started getting a lot more redness on my cheeks overall and from old spots (check photo). Sorry for the huuuuge paragraph on my skin story, but can anyone help me out ? Basically, do I definitely have acne Rosacea ? And also will MSM oral or topical help with my type of redness ? The weirdest thing is alcohol doesn't flare me up and the sun just makes my skin red which calms down soon after, just heat and spicy foods makes me red. Really just want to go back to what my skin was like a year ago :(
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Submitted by Nico0119