Is it possible to have a period and still be pregnant?

Okay so I'm always due on the 25th and my period came on the 27th or what I thought was my period, I usually have a light first day then 2-3 heavy days then 2-3 spotting days. Although my first day was kinda heavy but I was losing a lot of mucus. Then the next 2 days I had bright red mucus and blood and now I have brownish reddish mucus still coming out. I had sore breast but no cramping which is odd because I usually cramp for a entire week before my period and that's how I know it's coming but it didn't happen that way. So I got AF and though awh damn it but now I can't eat, I'm extremely tired 24/7 my nipples tingle, I gained like 10lbs out of no where which is odd because I've been working out and eating healthy. I also usually run out of tampons and I have still have half of a box left. I tried to eat my favorite ice cream and I almost vomited when I put it in my mouth. I have gas pains really really badly that just won't budge and I'm so confused because none of this makes sense right now and it doesn't help that my husband asked me "are you sure you're not pregnant you got really round for someone who's been working out and eating healthy" I almost wanted to slap him! But I cried instead. Ladies can you try to help me could I possibly still be pregnant?