2 days late

Cindy • My DH and I have 1 child together and have 4 all together. I have 3 from a previous marriage. We are currently trying for our last baby. We've been married since 05/14/16 and together since 02/10
Af was supposed to show yesterday and she's not here yet. My dr told me if I don't start by cycle day 32, to contact them to do bloodwork. I haven't tested yet bc I'm very very scared of it being negative. Only thing I have symptom wise is lower backache and my bbs are sore on the sides.