advice, opinions, anything helps.

so, my period was supposed to start on the 21st of this month and didnt. I haven't taken a test yet cause I want to wait it out a few more days. I just had my daughter 6 months ago and my periods have been normal sense besides the first month I got my periods back (which was 3 days after pp bleeding and had 2 periods in one month) so I honestly don't really know what to think if it could just be off from that or if I am pregnant again, it's only been 5 weeks sense my last period. What do you girls think? any advice, opinions, or anything will help :) thank you.