Advice needed please 🙏🏼

I have a short LP 9 days.. (I have an appt scheduled with my dr to talk about it in a few weeks) I’m currently 9DPO confirmed with BBT. My temperature was 97.58 both 7 and 8 DPO and then today spiked up to 97.78. Usually 9DPO my bbt drops significantly and I start my period that next morning. I took a test today and was BFN. Do you think I still have a chance? Could implantation have occurred yesterday and there’s not enough hcg to detect yet? I’ve been tracking my bbt for a long time. I did it when I was trying for my first and now the last 8 months trying for #2 and my temp has NEVER done this on 9dpo so I’m really confused and trying not to get my hopes up but really hope this is a good sign