Its New Year's Eve and I don't want to have to worry about this tonight, can someone help please?

Samantha
My cycle I September was 30 days, October was 26, and November was 28, today is day 29 and still no period, should I be worried or am I just irregular? I was sick about 2 weeks ago, I do some exercise on a dance team, should I be worrying or just wait it out, I had sex maybe 3 times, but with a condom each time, that didn't break, I had anal sex maybe 3 times also. Can someone please help?