If your blood pressure and your cholesterol levels are too high - they both should be treated. I think most doctors pay most attention to the total cholesterol and LDL levels. You don't give your family history, your habits, occupation, physical activity, etc and these factors may well be significant.
Your blood pressure is still too high and merits further treatment. I agree with your taking the pressures at home. If you want to get pregnant the medication used to treat your blood pressure should be acceptable in the pregnant state. Irrespective of the medication used, by all means markedly limit your salt intake and start a regular physical activity program (e.g. walking is good when one is pregnant).
Please keep in mind that I am unable to diagnose medical conditions online.