I'm confused , HELP ! Please

I was feeling really nauseated for about a week. My period was suppose to start today but ever since yesterday I've been spitting brown blood! And a little bit of brown discharge. Sorry I know this is too much tmi but I used a tampon overnight just in case I was starting and woke up to nothing on it but a little couple brown spots and when I wiped nothing and when I went to the bathroom again and wiped there was nothing, my boyfriend did tell me about a dream he had about me being pregnant. And he keeps saying he has a feeling. Oh and I took a test in the evening about two days ago and it came out negative. SHOULD I BE WORRIED, I don't think I'm pregnant but now I'm second guessing