It seems that you might be having lower respiratory tract
infection or chances of having pneumonitis
At this stage if pneumonitis is there there migiht be having resolving stage giving rise to pleuritic pain.
Consult your doctor and complete the course of amoxicillin
or your doctor might change the antibiotic.
If require go for x- ray chest to confirm the diagnosis.
Meanwhile take some analgesic
tablet for symptomatic relief of pain.
Ok and take care.