is this anxiety for real

I have been having palpitations frequently alive last week. though I have always had them since I was in high school but it has increased lately. I feel nervous trying things out when someone is beside me or when people are around me. I work in the hospital and when I am alone I perform my work better without making mistakes but when someone is beside me like a junior colleague who I am meant to put through things I mess everything up and end up making lots of mistakes making me look like a fool in front of them. These days I am not motivated to do anything around new people. These palpitations just keep coming and I feel like my heart will pop out. I am also of scared of going to the hospital to do a medical checkup because I am not prepared to get any diagnosis right now. I don't think I can really handle it if I am told I have a heart disease or what not.

Do you think I am exhibiting signs of anxiety or I am just overthinking

Please what can I do

Should I seek professional help