I went last night and it took 10 minutes for my heart to go back to like full calm sleep mode again. It wasn't even beating fast it was like under 60s but just felt too hard and my lungs were super sensitive. It felt like I was hyper ventilating but still myungs needed more?

Heart took 10 mins to calm and breathing too like 30...

I had a clear ECG 3.5 months ago so idk. I'm scared it's heart related. Can anxiety really do this?