Should I do a Test?

I am just shy of turning 30!

I am on day 31 of my cycle and due my period today but when I went to the loos I felt high and firm like I did when I fell pregnant with my now 10 month old.... I could still start later today as it's 6 am right now here in the UK ... HOWEVER at the same time I am itching to do a test! I can't get back to sleep!!! But i don't want to test & disappoint myself... ! We were barely active this month although I know it can take just that one time!!

Double celebrations for the new year may be? ....