Late period, Symptoms, Birth control

All over the place title 🧘

My period is late, Day 32 of my usual (usual as in EVERY month) 28 Day cycle. Or less. I took a test on day 28 and it was a definite negative, i’m wondering if i should retest just incase i ovulated later. According to Glow today is 15 DPO, i’m getting cramps that are definitely mild-medium compared to my usual AWFUL ones and my CM is thin and clearish white. I’m having awful back pain and that’s it, i have been hoping for my period to come but it’s not looking promising 😭 I am supposed to start the Depo shot as soon as i start it. I thought this could be because of my past birth control, But i have been off that for 4 months and my cycles have never changed lengths.