I really wouldnt think that you are pregnant if you have started "your period". With or without cramps
, although some women do bleed during
pg its not usually heavy like a period (and if it is its not usually a good sign). As far as a "bump" normally that would not be noticiable until at least the end of
the first/ begining of
the second trimester 13 weeks +, probably even later if this is your first pg. But anything can happen and every women is different.