Is it too early to having symptoms?!

Alyssa
My wife and I inseminated last Friday (the 29th). All this week, I've been exhausted, moody, emotional, had frequent urination, gotten acne (I only get right around my period) and today I asked her to look at my nipples and she said they look darker (and didn't know that is an early pregnant sign)!
Is it too early for me to be getting these symptoms??? I'm only 6dpo.