I'm in the same exact boat...Yaz to Loestrin 24, still on the first pack. I have also gained 5 lbs. and I broke out too. My skin is starting to adjust to the new hormone and I'm just not giving in to my new ravenous cravings. My doctor said it's completely normal for this switch and that I need to wait it out for two packs. I also have been VERY stressed so I'm not sure how much of this is due to the pill! I always break out and eat more when I'm stressed anyway, so it's hard to tell. I'm being more careful about what I eat and my stressful schedule is dying down, so I'll have a better idea of what's causing these problems later. I'll keep you posted. Also, keep me posted since we're in the same boat. Did you get your period at all?