Just thought I'd add that it could be. With my daughter, I'm pretty sure I felt it. It felt like weird pin prick sensations in my uterus (not cervix, more on the front under the pubic bone) and then one really sharp painful stabbing pain. This was maybe 5/6 dpo. My symptoms came on really strongly within about 2 days of that (at 8 dpo) and I got a strong positive at 10 dpo, so I'm sure it much have been implantation.
With my 2nd pregnancy (which ended in mc), it wasn't so much that pin prick feeling as just a weird cramping, expanding feeling, like AF like cramps (though I don't actually get cramps at AF, which is weird I know), but just sort of different, like a pulling, expanding feeling. It was a very distinct feeling. Symptoms again started two days later and I had a positive test the next morning.
I don't know yet about this month, but on Monday, I had the same weird cramping, expanding feeling. It was really obvious only because I've had it so recently (had the same cramping for the first few weeks of my last pregnancy, which was only in March, so it's recent enough that the memory is very fresh). I started to get nauseous on Tuesday and was really nauseous today. I think it seems too early still (8 dpo), but I got strong symptoms with my first at 8dpo and second at 10dpo. So it's possible. But yes, definitely think I felt implantation both times and it was really different than anything else I've found, so could definitely be what you felt. Any updates?
