Could I be pregnant? Help!

My family is the type of family that has dreams about fish when someone is pregnant or dreams of dirty water when someone is dying. My great uncle had a dream around Christmas time about the fish and no one can figure out who is pregnant. I just started my period today and I was supposed to start tomorrow. (I know it can start early or late sometimes) I know that you don’t get your period during pregnancy but I’m not sure if I should take a test now or wait a week because Christmas wasn’t too long ago. I don’t remember when I had sex before Christmas. I have noticed that I’m bleeding less than normal because I put a tampon in when I noticed I started but even before that I normally get like this giant puddle of blood that comes out when I start but I didn’t even feel it start this time and it was only a few drops. I’m not sure if I was just lucky to catch it right before it got bad but it’s still not bad and the tampon I pulled out about three or four hours after only had a little blood on the top and that’s it. I have had just pads on after that and it’s not my normal period. Normally I have to change if every two or three hours because it’s SOOOO heavy the first day. Could it be implantation bleeding or could someone tell me their experience like this so I can see if my story matches yours? Or should I take a test now or wait until I stop bleeding?