Scanty periods for about 2 years now.

I got my first period when I was 9. I used to have regular periods and the flow was also always normal flow of 5 days and without pain. I have been sexually active. But, for the past two years my relationship took a toll on me. I have been super stressed since then. I have also lost around 6-7 kg and not able to recover even today. My flow started becoming scantier and scantier. Last to last year I was getting only 2 days of normal flow and then almost negligible during the next three days but from last few months I get only one day of blood flow and very less during the remaining days. My sexual drive has also suffered since. I don't feel attractive. I don't feel like having sex at all which was not the case earlier. Is there anything very wrong? And would I not be able to concieve later when I plan to have a baby? I am getting married in a few months.