I was on blood pressure tabs before i fell pg. For some unknown reason, approx 12 months before my BP went up and didn't want to come down. I fell pg and went off them to be monitored closely and then had a miscarriage. I told the docs i didn't want to go back on them. Fell pg a couple of months later and BP inititally went straight up again. Doc told me that if i didn't rest and stop then i would be looking at medication through my pregnancy and also the possiblities of pre-eclampsia etc.
With a huge shock to my system, i did, i rested when possible, avoided stresses in my life and put bub and i first and in a matter of weeks i had it under control for now. I have my own BP machine and monitor it several times a week as well as the docs keeping a close eye on it, but so far so good.
Depending on how high yours is and for how long its been like it, they may medicate but taking it easy in the meantime could be a good option. Hope you get it sorted and can keep it under control.