I've got a cold, is it necessary to go to the walkin clinic?

I think i caught me nieces' cold, the cute little one sneezed on me or so it appeared to be i just started yesterday morning and carried on to today. I traditionally think that its a cold it will p just rest and drink bla bla bla, but this morning i find out she has an ear infection, now my parents are telling my go to the clinic, and get penicillin. I am thinking differently but not itdid get me wondering, i just want to let my body naturally fight this cold and play itself out, i don't really think its good to rely on medication all the time for simple colds, heck when i was 17 i took only Popsicle and sometimes Tylenol, I know the virus genetically modifies itself inside and such, the infection is different in an adult than an infant, but should i go? honestly please.