Preeclampsia symptoms early on

Any other ladies have preeclampsia? I was induced because of it with my second baby, I’m now 15 weeks pregnant with my third. I’m already having the horrible migraines & heart palpitations like before, and my blood pressure after sitting & resting for 30+ minutes is normally somewhere around 145/95. My OB says she can’t technically diagnose me with preeclampsia again until I’m 20 weeks and besides baby aspirin there’s not much else we can do. Is there anything else I can do to lower my blood pressure? Maybe any natural remedies? These migraines are horrible and I can’t help but think about having to deliver baby preterm given how high my blood pressure already is.