Could I be 3 weeks pregnant ?

I baby dances on July 9 3 days before supposed ovulation day. Keep in mind my periods are some what irregular but not really just depends. I’ve been having some symptoms after ovulation 1 dpo and today I wiped and saw a very teeny tiny red little mark. I’ve been feeling like when I’m car sick that nasty saliva but not as bad and some small backache and some cramps and also gas cramps. Could I be pregnant ?? Help !!