there's definitely more information we would need. have you had sex since? are you on birth control? and of course have you tested? are there any symptoms you are having like sore breasts, nausea, vomiting, cramping, tiredness or frequent urination? Like the ladies said above, I think your best bet is to ask your doctor about it and have him/her do a urine pregnancy test at your appointment. If you want piece of mine I would take a HPT and you will know more information after you test.
Keep us posted and good luck!
I would test, But i don't think you are you would defiantly know by now, it probably something else i would just ask your Dr when you go
Have you tested since ?? It would probably show up on the test if you were pregnant! Absent periods can mean many things not just pregnancy. Good luck though.