You have some symptoms. Take a test.
The spotting you experinced does sound like implantation spotting, however a pregnancy test will not turn postive until at least 10 days after implantation. If you still do not get your period after a week from your due date, take another home test. If you are not statisfied with this, you can go to the doctor (bulk billing as they are free) and get bloods done.These are symptoms of pregnancy however they can also most likely be caused by other factors that just come with being human.