Period every 2-3 weeks!! UGH!!

Had my meriena removed in July (had it for 4 years) but have been on other birth control pills since about 15 years old. I'm about to turn 29. Been TTC since having the IUD removed but I'm back to having HORRIBLE periods and they are now every 2-3 weeks!! The pain my right ovary causes is unbearable at times! I miss my IUD so much! Had very light period every 4 weeks and it was so light with meriena! I dont think I'll be able to conceive having a period every 2- 3 weeks!? Anyone else have this problem and able to conceive???