Sore throat swollen left tonsil Postnasal drip

For months now Iv had a sore throat swollen left tonsil and the inside of my ears are itchy. 
been for a ENT check and he said he's referring me for a scan COs my tonsil is swollen. Sometimes I get tongue pain but next day can go away I have cracks on my tongue bad breath and white patches (not thrush doctor gave me strongest medication for it didn't get rid of it ) 

Im terrified it's something bad I'm 24 with 3 young kids and worried sick