Missed pills - help!

So I seemed to have be rather forgetful with having a super busy schedule the past month & forgot to take my pills for 3 days, so in return I just took all 3 at the same time, then missed the day after that & then took 2 pills to play catch up again. Now it’s the end of the month & I finished my pills and have yet to start my period... got kind of worried, so of course bought a pregnancy test & it came back negative. Now I don’t know what I should do.. I haven’t taken a pill in about a week, so I’m not sure if I should go ahead & start a new pack or not. Help!