Need advice

So, some background. My period has been regular down to the hour since I started my old birthcontrol. I was on the same birthcontrol for a while now (7 day placebo) and my doctor decided to change it to the 4 day placebo. I skipped the placebo week in my old bc to start the new one early. Soon after I started bleeding for about two weeks so I called the doctor office to ask what I should do. I started the new pack and everything has been going well. Until now I have been taking the place l for 5 days now and I still haven’t started my period. Ive had sex and I’m not sure if anything happened or not. Should I worry about anything? Or should I just start my new pack? I took a pregnancy test and it was negative also.

I’m just not sure where to go from here.

Thanks for reading this if you did lol