Pregnancy or not ?

Hey ladies I need help .. so I’m 44 days late on my period lately I get very very mild like cramps but not really . I took a pregnancy test when I was on day 18 and it came out negative . But I still haven’t started and I feel sick right when I wake up in the morning and get a sick feeling if I don’t eat right away . But with all that being said I went to the bathroom (sorry if this is TMI) but seen very light brown on the tissue when I went to the bathroom twice . Been monitoring it for a couple hours and it only happens when I wipe sometimes ? What’s going on here