I'm CD 19, 4dpo. I know I can't have pregnancy symptoms yet. I'm feeling "pressure"/fullness in my uterus/lower abdomin area. Could this be something to do with implantation or ovulation. Positive OPK came back on CD 14. I don't have "cramps" or spotting.. Just a weird feeling. It's not like gas or bloating... Just ... Full of that makes sense ... Any input? I don't typically have this "feeling".