Preeclampsia symptoms advice?

I’m 33w5d...4th pregnancy...2 of my previous pregnancies I was induced early due to high blood pressure, with no other symptoms. Today I was cleaning my basement and felt fine, came upstairs and all the sudden started feeling really dizzy and light headed (I should note I really didn’t overdo it cleaning)...I’ve had this happen before if I stand up to quick or something like that but I usually can just lay down and it will pass...this lasted consistantly for hours today, to the extent when I would stand it would feel like the room was spinning or I was sort of falling to one side. I’ve got a headache too...it’s come and gone throughout the day but been pretty consistent. I don’t have any noticeable swelling. My fiancé was at work with our only vehicle so I had to have my mom take me to get checked out and just went to med express as to not put her out too much watching my other 3 kids while I sat in the ER for hours when the roads/weather are terrible right now. They told me nothing was wrong, everything is fine. My blood pressure is 136/78 and my pulse was 83 I believe. No protein in the urine and my glucose levels were fine. Now I’m at home laying down and just looking at my phone is messing with my eyes and I feel like the room is spinning. What else could this be????? Baby is moving around fine but I’ve never felt like this and can’t help but be worried.