Preeclampsia symptoms?


I’ve been having the absolute most drama with mentally ill (undiagnosed...but not a joke) mother. Drama that has lead me to take on the guardian role for my younger sister (17. 18 next week) I’ve had to yell, cuss and work myself up numerous times in the last week. I’ve had persistent headaches. That won’t fully go away, and I’ve been dizzy and nauseous to the point of vomit more than once. Someone told me that i might have gotten my blood pressure too high. Are these symptoms of preeclampsia? Can i bring it on myself? I am 36w+3. I have a routine prenatal appt tomorrow morning so i can’t decide if i should wait it out or...idk lol any Advice is very much needed.