Panic Attacks When Being Alone

Hello Everyone,
I'm very happy that I found this forum and hopefully I can find some advice. I'm 30 years old living in Sweden with my fiance.
I consider myself healthy I'm not overweight or have any other serious illness. But for the past few months or so I have been experiencing Panic Attacks when being left alone. I'm afraid that something could happen to me such as a "heart attack" or something else serious and that no one will be around to help me. It can even be when walking around Ikea or driving my car alone, that my mind starts thinking how far the nearest hospital is in case something would come up or if anyone would help me. When I get these panic attacks, my face and legs get tingling feelings and that is when I get afraid that something might happen any second. I have visited a doctor and they couldn't find anything serious.

For the past week, I have tried meditation using Headspace and it has helped me a bit. I'm very thankful for any advice I can get. Or if I need to answer any questions to clarify a bit more.

Thank You