... regular period since I've gotten it. However the last few months I've been so exhausted and I've had really bad headaches. I can sleep all night, wake up to take my kids to school then I'm right back in bed and sleep until 12-1 in the afternoon and I wake up with headaches that won't go away. Can this be caused by the mirena or just my period? Can mirena cause sudden side effects? I've never been this exhausted before while on my period so it's frustrating. Should I remove my mirena? Any help would be appreciated! Thanks