Anxiety

I recently had a coding interview where I was given a fairly decent hard problem. I couldn't think of the optimal approach during the first few minutes and then panic set in and I went on coding the brute force approach and got it working but there were a few edge cases I hadn't thought about. I have about 10 years of experience and I've previously worked at Google, Amazon and Microsoft. I have cracked difficult interviews before and what happened during my last interview had never happened before. My heart was racing(heartbeats approx 120+ while sitting on a chair) and I couldn't visualise the problem in my head. I have practiced sufficiently. But I don't have a clue if during the next interview, I'm going to screw it up similar to my last one. Could someone please share some advice?