Postpartum Preclampsia?! 15 months!

2 weeks after I had my baby I was diagnosed with Postpartum preeclampsia. They put me on Blood pressure medicine and I was fine. A couple weeks went by when I ran out I was like ok I should be okay but now without them... nope it sky rocked again and had to have my primary doctor prescribe the BP medicine. I’ve been on the BP medicine for 15 months now. Feeling fine on it, does this mean I’ll always have to take BP medicine and it’ll never stabilize? I thought postpartum eventually goes away... we want to have another baby eventually but if I have to be on medicine I will not! I didn’t have any high blood pressure my whole pregnancy.