Heart Pounding etc

H 💍👧🏼👶🏼🤰🏼

I’m almost 26 weeks. Today I’ve been experiencing a lot of symptoms I didn’t have with my first pregnancy. My heart feels like it’s pounding even when I’m just sitting at my desk. It feels hard to catch my breath and I feel sort of dizzy or lightheaded. At one point, I was seeing spots. Has anyone experienced anything like this? I was thinking about calling my OB but didn’t want to over react.