Hi, I've Been Feeling Off For That Past Month, Feeling

Hi, I've been feeling off for that past month, feeling sick, dizzy like I'm going to pass out, really tired, off my food and really shaky, going to the toilet a lot more and stomach cramps. I've done a pregnancy test an it come back negative, but this morning I'm having really light period but only when I wipe. I'm not really sure what it could be... Could it be a sign of being pregnant? Thank you for reading