I have been diagnosed with epididymitis by my GP and been put on co-amoxiclav 625mg three times a day for 7 days. I'm 3 days in and the pain seems to be getting worse. I've read elsewhere online that co-amoxiclav isn't the right treatment in cases of epididymitis in men under 35 as an STI such as chlamydia is usually the cause. However other websites state that amoxicillin-based antibiotics such as co-amoxiclav can be used to treat chlamydia successfully in pregnant women. Should I contact my GP to alter my medication or can I expect the co-amoxiclav to have an eventual effect?