Does it sound like I could be pregnant?

you could be pregnant but not based on those symptoms. You wouldn't be having symptoms this early, as the zygote typically implants into the uterine wall about 10 days after ovulation... so if you're perfectly regular and your egg was fertilized, implantation should take place in about 2 days. You don't have symptoms before this because your body does not begin producing pregnancy hormones until after implantation- in other words, your body wouldn't know you were pregnant this early.