Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern..
As per your complain as you have cold that is a viral infection and can very much infect the throat too causing
sore throat..
A white spot over the throat can be a pus pocket that is due to secondary bacterial infection in throat along with viral infection..
Nothing to worry as although you have got tonsils removed still there can be infection in throat causing
Pharyngitis..
I would suggest you to take a course of antibiotics like
Azithromycin, anti-inflammatory painkiller like
Ibuprofen, do warm saline gargles, do steam inhalations and use a humidifier in your room..
Chew Vitamin C pellet and suck throat lozenges..
In case if there is cold and congestion decongestant nasal sprays containing
Xylometazoline and oral pseudoephadrine can be taken along with other advised medicines..
Avoid chilled and spicy foods..
Sip on plenty of warm water..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.