Heart flutters.... 20 weeks

With my son, I had these a few times but it would only happen for like a second or two! I’m now 20 weeks w my second baby , and it’s happened a few times but when it does it lasts about a minute or two and scares the shit out of me. I’m so scared of something being wrong w my heart.... when it happens kinda feels like I’m having a panic attack or when it happens it could be causing a panic attack. I’m so nervous.... 😥