he ejaculates inside me everytime. i havent yet had a period since coming off of the injection but today i started getting a pinkish/brown discharge. we had sex 4 days ago. could this be implantation bleeding? i took a pregnancy test 2 weeks ago and it was negative but i have nausea, headaches, heartburn, dizziness and Im exhausted. my clothes feel tighter and i experience cramping. should i take another test? it also feels like constantly need to use the toilet but cant always go. it feels like there is something in my stomach. please help. we are trying to get pregnant and the negative test broke my spirit.