Breast lump

Hello everyone , I felt a month ago a lump in my breast my doc over the phone left out antibiotics which I took and made no difference I no have a app on Wednesday but I have severe social and health anxiety and I can't stop thinking the worse . It's about a cm and like a hard pea feels smaller when I am laid down and it feels like it's stuck on breast tissue . I do have bumpy breasts also I am a bigger lady . I guess I am just on here for some support as I am a single mum of 4 (23,21,17,13 ) and I lost my parents and sister so feel quiet alone