Pooping - An Early Sign of Pregnancy?

I know this is a little tmi but is pooping a lot a early pregnancy symptom? I go every time I go to the bathroom to pee. Even if it's just a little bit. at least 15 times a day. I'm only asking because its odd for me being I only ever went once a day if even. I don't eat alot but I've been eating alot more lately & having a lot of lower back pains. Has anyone else experienced this before?