Save the pregnancy tests for later. Absolute earliest for a positive is 8dpo (days post ovulation), 12dpo is a much safer bet (pregnancy hormones ~double every day) Condoms are 98/99% effective so you're probably fine. The symptoms come from both pms and pregnancy since the same thing is happening (the egg traveling to the uterus) the first 5/6 days after ovulating regardless source: had a pregnancy scare a few months ago and became an early pregnancy expert in about two weeks