Opinions.

Okay, so I have had ovarian cyst a previous time before. And they took me off my birth control. This was back in April. Since then the pains have lessen more and more. And my period have only been up to 5 days. (I was happy about that). Now it's October and I haven't had my period in 10 weeks. I have already taken several pregnancy test and have had a sonogram. My gyno didn't say anything. But the back pains and cramps I had before are starting to come back. I wonder if it's the cyst again or if I'm so over weight that my body doesn't know what to do. I don't know. I need some help and opinions please.