Crazy cycle

Hi ladies. Just a little backstory, I am 35, married to my husband for 17 years/together 18. We have a 16 year old daughter and a 15 year old son. After our son was born my husband had a vasectomy. Fast forward about 8 years and I wanted another child(always have), husband agreed but did not want to have vasectomy reversal. We have faith, so we started praying for a miracle. After a few years of nothing, we tried using a sperm donor. Tried for 9 cycles unsuccessfully, and my husband was severely injured in a car accident. He was hit by a drunk driver and had an almost 11 month recovery. We decided not to try further with a donor. Fast forward to now. Husband has not had vasectomy reversed, never used any type birth control, and I have only had sex with my husband. I am currently 25 days past ovulation. I had very light spotting on days 10 through 13 past ovulation, period did not start on day 14po as usual. I am now 11 days late for my period, no bleeding at all. Had some light spotting after sex on 16dpo, but nothing else. I have taken a pregnancy test every day since I have been late and have gotten 11 BFN. My periods are never more than 2 days early or late, and I bleed very heavy for 5-7 days. I am so confused, and I know there is really nothing to do but wait for either aunt Flo or a positive pregnancy test, just hoping someone might have some insight.