Ttc for 2 years now

Alyssa & Elijah`s Mom
So I was suppose to start on the 19th nothing yet I haven't tested yet. I'm very proud of myself for not testing but today so far it's driving me crazy I want to test so bad today. Should I test I am now 3 days late. Me and my husband have been trying for over 2 years I have a 12 daughter, he doesn't have kids. Please I need support I'm so nervous to test and get a Bfn.