blood pressure level above 140/90 mm of hg, detected first time in pregnancy can be taken as pregnancy induced hypertension
the complications due to this will depend on the gestational age
of the onset, earlier the onset more will be the complications, as you are already in tenth month, with mild hypertension
and on medication the chance of complications are less,
but you should not stop taking treatment and should have periodic checkups till your expected date of delivery, if any abnormality is detected either in mother health status or in monitoring of baby like decreased heart beat etc better to admit in hospital and further management should be according to your doctor's advice.