mirena ..... pregnancy? and period questions....

Chazzy
So i been on mirena since oct of last year and last month i got a " period " for the first time it lasted two days .... for almost two weeks now ive been extremely nauseous and peeing more than usual and " tmi " but for the first time since the nausea began i threw up my favorite ice cream 😥 any have any stories to share ? And is it normal to get a period and then miss the next month 🤔 ? I have an appointment on monday just curious on anyone elses stories etc 
Thank you ladies in advance ♥️