hello and welcome to HCM,
Any pain of the ear which does not respond to routine pain killers and associated with muffling or ear block must definitely be examined by an ENT so that more serious lesions can be ruled out. In most of the cases it will just be a mild infection which can be effectively treated but please do not take any chance.
Also since you also have pain in the head then you need to get evaluated to rule out sinusitis
and CT PNS)
take care and get well soon
Dr Sriram Nathan