If your blood pressure was on one occasion raised to 130/90 mmHg and otherwise it was between 110-120/70-90 mmHg with normal urine results, I would not even bother advising any antihypertensive. 250 mg of Alpha methyldopa once a day is a very inadequate dose anyway! I do not believe it is doing anything in terms of helping blood pressure profile over a 24-hour period. It would be helpful to do some renal and liver function (blood) tests. It would be further reassuring if they are normal.
Based on your history, I do not see any reason for advising caesarean section. You can very well hope to go in spontaneous labour and achieve a nice and normal delivery. If the blood pressure remains under control (as it seems to be) you can wait for at least 10 days over your due date. I would advise to take this approach (of waiting) only if you are sure of dates and preferably if EDD was based on scans from early pregnancy. If you do not go in labour by that time then you may undergo induction of labour (by giving some preparations vaginally you will be made to go in labour).