Hello and welcome to HCM,
First of all i must appreciate that your observations are very sharp although you are in school going age you are smart enough to notice the difference.
Now, let me try to help you out with the problem. You have white spots
on tonsils which first went away with antibiotics, it again came back and you feel it swollen. This is surely tonsillitis
(may be acute or chronic). Now, the white spots are due to specific organisms causing it. Streptococcal, diphtheria
etc & etc produces white spots. Diphtheria specially produces membrane and bleeds, so i do not think it to be diphtheria. Also now a days maximum had already got DPT
vaccines in childhood. No need to worry about it.
I suggest that you get a "throat swab culture and sensitivity" done. Meanwhile you can do a regular "povidone iodine
"gurgle. I will not write the drug name as not allowed by HCM. You have probably uploaded a photo but it is not at all visible. Perhaps something is wrong somewhere. You can take help of your local doctor for check up.
Just do not worry, i am sure you are smart enough to handle any situation.
I wish you a very very early recovery and a healthy life. Keep in touch