Hi. I am 26 years old. Trying to conceive. My LMP was on 5th april. My husband and I were intimate from 14th april to 23rd april (everyday). According to calculator 30th April is my day of implantation, but I don't have any spotting or bleeding. Do all women have spotting/bleeding during implantation. If I do not bleed does that mean implantation hasn't occurred? Also I have lower back pain and lower abdominal pain. Is this just PMS or am I pregnant? Also I am feeling very tired and sleepy, frequent urination, feeling bloated and my nipples are paining.