Is it worth testing?

Manda • I`m 30 and have 2 beautiful girls
Hey girls,
I am ttc baby #1. I am 12/13 dpo and I am due in 3 days. This month I have had no symptoms like I normally would before AF. All I have is constipation and trapped wind. Really bad! I only bd twice in my fertile window. One day before a positive OPK and 2 days after so I'm figuring I am out this month, but there is something niggling at me that makes me wonder if I should test anyway? What do you think? Any advice would be really appreciated 😊