It's possible. Take a home pregnancy test to find out.
Im experiencing the same thing, im usually 30-31 days (well i say usually its been like this past 2-3 months) and we're trying to concieve, i had a couple of days of spotting and late last night it started to look more like a period but it doesnt feel like it. i think a test would possibly put your mind at rest, fingers crossed for you
Were you pregnant after all? The exact same thing is happening to me!