Need advise plz

So I'm 5 days late , I've been having period like cramping on and off since I was supposed to get my period. Still nothing. Wondering if I could be pregnant? We use pull out and sometimes he goes in me. But this month I've quit smoking and started eating more and gaining some more weight so I'm a Lil more hethy than I was in the past. We've been using pull out for about almost 3 years and never got prego. But wondering if it could have happened this time!