No period?!? Help!!!

Sarah
Help! Havnt had a period since November. I had the Mirena removed in September and only had two normal periods. I'm 30 and my husband and I are trying to conceive for the first time.  I was testing for ovulation and I've never gotten a positive for ovulation. I am over weight and have been trying to loose. I'm feeling so down because my body is not working. Anyone have any trouble with ovulation or lack of? Anything I can do to jump start my ovulation other than loosing weight (which I'm doing) any help would be great! Thank you for reading!