7 dpo...symptoms already? Help!!

Betsy
I am now 7 dpo and the last few days my boobs have been really sore and my nipples very sensitive. I have been getting up at least 3 times in the middle of the night to pee. Which I usually don't get up to go until morning. Is it possible to have pregnancy symptoms this early? When did some of you start experiencing symptoms with your pregnancies?