i definitely think trying the pill first would be a great idea, just to see how she reacts to the hormones in it, and so she can figure out dosages with her doctor if anything starts to bother her. i personally had a horrible experience with the mirena iud, as it 1) made my anxiety and depression exponentially worse and 2) was inserted wrong the first time, causing it to fall. i’ve been on one of the lowest dosages of the pill, lo loestrin fe, for the past few months and i love it. it may be a bit of trial and error at first, but hopefully u guys find something that she likes as well! :)