Yellow lump in throat

Hi, 

im a little concerned to be honest. (I suffer with health anxiety) so any little symptom leads to me thinking the worst. 

im 31 and had a yellow spot behind one of my tonsil for over a week now. 

I haven't got a sore throat or anything. I've just recently quit smoking aswell. So I've been coughing up a bit of phlegm every now and then.  And I'm just thinking the worse right now.

had my bloods done 2 months ago and everything was perfect. 

think I'm just looking for a bit of reassurance to be honest. 

thanks for reading.