I think that you may be overreacting. Lymphoma usually first presents with swelling in the neck, underarm and then on the groin. Some additional swelling can occur where other lymph nodes are located such as in the spleen.
Enlarged lymph nodes can
encroach on the space of blood vessels, nerves, or the stomach, leading to
swollen arms and legs, to tingling and numbness, or to feelings of being full
and you don’t experience any of this.
Symptoms of lymphoma are also chills, unexplained weight loss, night sweats, lethargy, fever and itching.
Since your symptoms, luckily, are only similar to these I can understand your fear but don’t suspect the worst. If your doctor don’t know what to do maybe you should seek another opinion and see what is the other doctor going to say. Let us know what was in question.