birth control is messing up my period

so i recently started birth control on the third of june and everything was normal. my doctor did start me a week later than normal though, so it wasn't such a long wait. but i started my period the third week of my pill and it lasted 10 days... which i usually only bleed for 5. now i've been spotting everyday. i only have 4 more pills in the pack too. will it go away after this pack? or should i see my doctor?