Possible early symptoms?

Okay, here we go. My back hurts so bad I don't even want to clean my house, and my nipples are killing me. I keep getting small, sharp pains in my lower abdomen. I've been feeling like I'm going to vomit at least a couple times a day. I'm not sick and these aren't my usual period symptoms (I usually get occasional cramps with my period, but not until after I actually get it). Could these be super early symptoms? I wouldn't exactly be upset if I'm not pregnant as we're not obsessively ttc right now but it really has me thinking.