Dear lybrate-user Your description suggest that your body is going through hormonal imbalance
due to which your body is accumulating weight. The same is leading to menstrual irregularity as well. Since you are newly wed it is advisable that you 'MUST' visit Gynaecologist
to get your self evaluated for hormonal imbalance, ultrasound
and physical examination. Primary intention will be to evaluate you for helping you out in conceiving.
Hope this works for you. Good Luck.