How do you deal with stress and anxiety?

I have been trying very hard to cope up with stress and anxiety but idk nothing is working for me…..i get anxious very easily even though i am pretty confident and get the work done pretty easily but the anxiety creeps in for things one after another, constantly i compare myself,i seek validation (even when i was pretty popular) still i seek validation and people pleasing, also i get bit scared when i hear shouting and screaming… I get all my work done perfectly, i am pretty popular but i keep getting anxious and seek validation and often compare myself What you guys do to cope up? Please share so i can really try this is exhausting…