Hi ! The acne
and pain during ovulation could be normal in the transition period of puberty
, and in some they are more pronounced. However considering the family history of PCOS, I would like you to consult the family physician, and if advised to go for an ultrasound
Feeling tired and loss of appetite and recent development of memory problems also demands for investigation of your thyroid
status, which is not uncommon now a days.
These are all the possibilities which can be excluded only after you see your family physician and get investigated. Good luck.