BBT Implantation ???

Just curious. Those of you who have gotten a BFP. Did it show on your cahrt a dip below the coverline between day 4-6? With my first pregnancy it did my second was a surprise ;) and this time I am only 7dpo but didnt have this happen. Just wanted to know what others had experienced

I didn't chart with my first pg'cy, then the pg'cy that lasted until about 10 weeks I didn't have an implantation dip that I remember or at least not one that went that low. I've heard it can go either way, though, so good luck!