last night i noticed a very small amount of pinkish discharge after id been to the toilet. i will be 18 weeks on saturday. anyway i put it to the back of my mind but just now ive been to the toilet and noticed the very smallest amount of blood when i wiped. sorry tmi!!!!! should i be worried. i had cramping today but thought it was the baby stretching, is it too late for implant bleeding. should i be worried.