Can u start having symptoms of preeclampsia before ur bp rises?

So i been having on and of migraines since 33 weeks and a little bit of vision changes. At first I thought it was related to my gd, but now i am 35 weeks and I noticed that its everyday now and vision has become worse i keep seeing blurry sometimes & black spots & some dizziness so i called my clinic and they told me to go to a store to check bp😑 & if it was over 140/90 to go to l&d so i went to Walmart bcs they have one there and idk if i was nervous bcs everyone was watching as they passed by and i was kinda moving but it read at 142/94 so I panicked and went to the hospital at the hospital it was great every 15 mins they checked but they did some blood work and urine sample and those came a little elevated than normal.. i bought a bp monitor and its been fine at home too but im worried that i might be developing preeclampsia bcs of the symptoms yet i still dont have the high bp is it possible i can be developing it???