Am I pregnant or is AF coming??

My husband just got home from deployment so we have been having lots of sex and decided to start TTC. Last week I had diarrhea for 3 straight days but it was jut diarrhea no sickness or anything. My boobs have been super sore as well and I have been super tired and moody. My poor hubby has been dealing with my whining so well. Yesterday I woke up and had started spotting but mostly brown discharge with a little bit of bleeding. Today, nothing. I took a pregnancy test and it was negative but something feels off. I took the test on my 3rd pee of the day. I also consume a lot of water so not sure if that could sway the test at all?? Could I be pregnant? Or is AF just messing with me???