Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain you are diagnosed with 
Tonsillitis and you have red and brownish spots on the tonsils along with 
swollen lymph nodes..
These symptoms are of 
throat infection leading to Tonsillitis and get s not due to Lymphoma or Cancer..
Nothing to worry as there is nothing serious..
You should continue taking antibiotics as advised by your Physician..
You should also take anti-inflammatory painkillers like 
Ibuprofen or 
Naproxen..
Do warm saline gargles, steam inhalation and use a humidifier in your room..
You can suck throat lozenges and drink plenty of water..
Avoid spicy and chilled foods...
You will start feeling better in 3  to 4 days..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.