Is It To Be Concern About Body Aches And Pain In The Mac Tuck?

I have been having issues with body aches and pains as if a Mac tuck has run me over. Face and neck swelling (currently on the right side of face). Lymph nodes in neck are enlarged. Lymph nodes under arms and between legs hurt. Tingling and numbness in a variety place on my body, especially hands and feet. Every time I eat my bones hurt worse. Headaches, chest pains on occasion. I went to my GP he ran blood work and said I had elevated test on the Epstein Barr Virus, which I now know I have. But I m concerned what else might be wrong with me. GP has asked that I do a Ultrasound of Abdomen due to the strange issue of me eating and being in extreme pain. When I do eat, my belly swells and it tender on both the left and right side. I have constant constipation. He is also sending me to a GI doctor to check into this more. The other biggest issue is the newest revelation, huge bruises on the back of my legs / calves. This is more concerning to me. Shall I go to the ER?? Or wait this out and see what results come back.