not conceiving ..

So around October 2015 I miscarried and my fiancé and I were devastated. A few months later , January-February 2016 I once again miscarried and ever since than I have had off periods for the majority of 2016 were they would be 10 days than 3 days than no period at all. It's currently March 2017 so I haven't gotten pregnant and miscarried in a whole year. We have a 3 year old together and was trying to see if anybody else has ever had this issue. Just seen the doctor today about my thyroid which my gynecologist said was off a bit but he said I'm fine and is ordering me another blood test. I've gained weight. Can't lose any. Just beyond stressed. Just beyond confused. Suggestions? Stories? Advice?