messed up cycle I need help!!!

April

I missed my period for 4 months but I haven't had sex I had constant pains on my left and right side so i went to the er and they took a cat scan and they said everything looked normal that it could be cyst on my ovaries but they couldn't see... by the end of December I finally got my period and had really bad pains.... im waiting to see if ill have my period this month or will I have missed periods.

what should i do!?