Blood pressure

So I'm just wondering if anyone has experienced this.

My blood pressure has been low all throughout this pregnancy, like 90/60. So I got used to taking things slow and what not. It's normal for me because I'm very small and an athlete.

Well today I'm in Walmart by myself because my husband is working and I start to feel off. I started sweating and got nauseous and genuinely felt like I was going to pass out. So I figured my blood pressure dropped. Well I walked over to their blood pressure thing to check and make sure it wasn't dangerously low. It came back and it was high, especially for me. 120/90.

I have a doctors appointment on monday and I'm definitely going to bring it up. But I was just wondering if anyone else experienced this or any advice?