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Yes, it is right. You can have these symptoms if you are going through a menopause. As both your ovaries are removed, you are going to end up in menopause. This is called surgical menopause.
To decrease the symptoms of menopause your doctor prescribed you Microgynon (combination of Ethinylestradiol and Levonorgestrel). This is called hormone replacement therapy.
Because of the absence of both the ovaries, the hormones are not produced in your body. Hence, it is replaced from outside in the form of tablets. Since you are not taking it on time, you are experiencing these symptoms.
Thyroid problem and cholesterol levels are the other correlated problems that can be associated, so your doctor has asked you to do these tests.
So remove your confusion. If both the ovaries are removed, then you cannot be pregnant.
For further information consult an obstetrician and gynaecologist online --> https://www.icliniq.com/ask-a-doctor-online/obstetrician-and-gynaecologist