I believe these are located on left upper part of your abdomen; as you had stated on the left side of the stomach. So, just check their consistency (firm, hard, or rubbery), the duration you have been watching them, are they gradually growing in size over a period of time, mobile or immobile with your finger or not and the color of skin over them. If you see them sitting quitely in the same location without any signs of pain, then I don't think you need to worry at all! These could be two benign lymph
nodes/glands sitting beneath your left chest wall/Diaphragm which you could easily palpate (feel). However, let me know about your answers to my above queries so that I can help you out to know exactly about your case. Thanks.
Swapan Kumar Das