So confusing please help?

Ok so if you have been following along then you would see why say this is confusing but for those who don't know her go a brief summary. I took my mirena out on march13 2011 after having it in for two yrs than i bleed from march 15-19 and me and ny husband are trying to conceive and we be putting a free days between so that we have a better chance. We had sex eleven times since than and i had bleed just enough for tissues but not a pad on the 9th and the 27th of June i had some blood work done about two weeks ago and i did Yesterday and everything is negative but my stomach hurt and my patting habits have changed since please w/o being sarcastic can some one please help and tell e what you think