Hello,
Welcome to Healthcaremagic.
Just a simple cyst in left ovary usually does cause a severe pain abdomen. Please repeat an ultrasound abdomen.
Cyst in ovary may cause severe pain if it undergo torsion.
If nothing found then do an MRI abdomen.
Right side abdominal pain may be due to Appendicitis, colitis,
Internal Hernia,etc.
Now you have only right ovary left.if this is also removed, definitely it may cause
premature menopause. Because removal of both ovaries may result in depletion of oestrogen and progesterone.
Thus
Hormone replacement therapy becomes essential to decrease the side effects of depletion of hormones.
Earlier it was thought that HRT increases the heart attack,
deep vein thrombosis and stroke.
But now it it is concluded that HRT significantly reduces the risk of mortality, heart failure, or heart attack, without any apparent increase of breast cancer, deep vein thrombosis or stroke.
So better
consult cardiologist and taking HRT is essential before removal of your right ovary.
Hope this Helps.
Take care.
Regards,
Dr.Manjeth