Hi i am 17 years old and i am suffering a lot of problems on my body . My neck is always heavy and also with my shoulder. And i feel that i am going to past and i always having a problem on my body specially on my abdomen.. We went to a doctor for a ultrasound and the result is normal.. And my stool test is also normal, but my stool is always thin and i always think about it. Is this anxiety disorder? Please response :(