Could it be anxiety?

Mariana

I've been feeling fluttery/butterfly feelings in my chest and right after that happens, my heart races for a few seconds (5sec I'd say) and sometimes there's also tightening followed by the heart racing. I've been feeling it for a week, and for a week I've been freaking out about a certain problem I have right now that's basically invading my brain and I can't stop thinking about it. Could what I'm feeling be anxiety?

Thank you!