I think you need to write to the oractice manager about the receptionists advice.
If yellow gunk is coming out it's probably a slow perforation and wham one would have peaked to excruciating pain and then bang and a sodden yellow pillow.
Get him to the Dr tomorrow; there is no guarantee they will give AB's if he doesn't have a temp.
DS had shocking ears as a baby, infection after infection and then grommets did the trick for 8 years. Privately BTW- not available on the NHS.
Aged 9ish he had a perforated ear drum. It was horrific. NHS response "oh great, it's burst that will deal with the pain. It wept and hurts for days. Gp very reluctantly prescribed ABs and said an ENT referral was not necessary.
A few months later it burst again, when he was ski-ing in Austria. His housemaster took home straight to the Dr who referred immediately to an ENT specialist. His ear was cleaned and he was prescribed antibiotics with a follow up appointment after 24 hours.
Compare and Contrast.
When he got home I had him referred privately. The GP didn't think it was necessary but humoured me. The ENT specialist diagnosed him with a condition called choleastosis (sp) where there is a build up bone in the ear canal which causes the drum to grow back on the wonk. Every time it goes a bit more bone/calcification is laid down. It took a little grommet to make the drum grow straight. A couple of.more perforations and real damage would have occurred and his hearing may have been impacted long term. His paternal great grandad went stone deaf in his late 20s.
Don't be fobbed off op. Get the ABS and insist on a referral.