Cycle day 42!!

Sandra
My SO and I have been trying for baby #2 for about 6 months, been off the nexplanon since February, my period was supposed to come on sept 25th but still nothing to this day had multiple negative hpt plus 1 negative at my obgyn. Still no symptoms of af had some blood stroked cm when I wipped 2 days in a row but still no period and still getting bfn! Could I still be pregnant but my HCG levels too low to detect on a test?