C.W.
Hi A.-
The short answer is...IF YOU HAVE HAD SEX...yes you can be pregnant...
I know for me...stress DID do things to my cycle...
I would (if I were you) assume the 'lifestyle' of a pregnant mom...vitamins...folic acid...no smoking...no drinking...etc until I found out through resuming a period that I was NOT preggers...
best luck!
michele/cat