Hi welcome to Health care magic forum.
Thanks for calling H.C.M.Forum.
You have got lymphoma, and got chemotherapy completed in january. You had cold attack 3 weeks ago, Used amoxycillin , got cured and again there is recurance along with throbbing ear pain.
The first one is common cold, and the second appears to be due to secondary bacterial infection, over the second viral infection.there is also a possibility of metastasis due to lymphoma.
I advise you to consult an E.N.T.surgeon for diagnosis and treatment. You may need to have M.R.I.throat swab besides other routine tests for confirmation.
Wishing for a quick and complete recovery.
Best regards.

Hi, Thanks for your query, A warm compress. Placing a warm, moist washcloth over the affected ear may lessen pain.
Pain medication. Your doctor may advise the use of over-the-counter acetaminophen (Tylenol, others) or ibuprofen (Motrin IB, Advil, others) to relieve pain. Use the drugs as directed on the label. Use caution when giving aspirin to children or teenagers. Because aspirin has been linked with Reye's syndrome, use caution when giving aspirin to children or teenagers. Although aspirin is approved for use in children older than age 2, children and teenagers recovering from chickenpox or flu-like symptoms should never take aspirin. Talk to your doctor if you have concerns.
Eardrops. Prescription eardrops, such as antipyrine-benzocaine-glycerin (Aurodex), may provide additional pain relief for those whose ear drums are intact (not torn or perforated). To administer drops to your child, warm the bottle by placing it in warm water. Put the recommended dose in your child's ear while he or she lies on a flat surface with the infected ear facing up. Benzocaine has been linked to a rare but serious, sometimes deadly, condition that decreases the amount of oxygen that the blood can carry. Don't use benzocaine in children younger than age 2 without supervision from a health care professional, as this age group has been the most affected. If you're an adult, never use more than the recommended dose of benzocaine and consider talking with your doctor.
Regards, dr.d.p.