Help, can someone please respond.

I've recently just stopped eating meat 2 weeks ago, but I'm wondering does this affect my period.  My period was supposed to have started Jan. 17th, but it never came. 3 days later I was spotting reddish pinkish everyday. Today I am still spotting like that. It has been constant the whole time, but I only see the blood when I wipe, it's never on my pad. This has never happened to me so I don't know what I should do. I took a test just to be sure, but it came out negative.