By one of you're ovaries being remove it cause your hormones to get out of balance. So you're going through a early menopause.
Welcome to the community. I am sorry for your troubles. The removal of one ovary can disrupt the menstrual cycle. Sometimes the other ovary does not take over and actually gets "confused." This may very well be only temporary. So hopefully, your remaining ovary will get the message and take over for the missing one! Please keep us posted as your situation may help someone else.