Talk to Dermatologist on Acne Cyst Or Abcuss

Actually i dont have an idea what it is..couples of month back large red pimple appeared on my face..after some days i found out there is something like lump inside it...doctor diagnosed it as single acne cyst and recommend me 2 dose of augmentin...i followed the course for 3 weeks and left it with stomach acne( due to heavy dose)..now there is still a small lump inside that pimple and also that pimple turns out in small white pimple..other than that pimple 2 more pimples or whatever it is appeared on my face nowadays...suggest me what to do..and yes they are painful in start