Thanks for using the forum on HCM.
From your symptoms, this pain can be due to variety of reasons apart from appendicitis
, which includes any pelvic inflammatory disease
, ovarian cysts, hidden hernias or regional terminal ileitis
. The pain can also be due to viral infection since you did mention you having sore throat and cough.
Advise would be to seek professional medical advise from your doctor, who can rule the above conditions with complete blood test and an abdominal ultrasonography
Feel free for further queries.