Skyla

Hello. I'm 19 years old and had the IUD Skyla put in place by my GYN. I had previously been on the Depo shot for approximately 3 years, with no negative side effects. I decided to change to an IUD for the long term reasons. But since I got it inserted (3 weeks and 4 days ago), I have had headaches / migraines (chronic migraine sufferer), acne breakouts (not one that usually gets acne), and weight gain! I can deal with the acne, but I'm concerned about the frequency of headaches and the weight gain. I am usually ~125lbs, but last time I weighted myself I was 134lbs! I eat healthy and am constantly on my feet at work. Are these average side effects? I would like to hear more comments about the weight gain, if it's just me or if the IUD has something to do with it. Long post, thanks for any help and info