Could this time be it or is it another disappointment. .

Last week my period came on early it was just spotting lightly for 1 or two days. Then this week my period was suppose to come on but it hasn't came on yet. I really haven't had any symptoms . But some days I'm bloated and I've been really gassy. And sometimes I'm constipated and sometimes I poop just fine And little cramps here and there but when I was late before I wasn't pregnant.so could I be pregnant? and I want to week another week before testing to see if my period comes on.