are they right?

So I have been really depressed the past 2 days. I suffer from bipolar depression but am on medicine for it. yesterday it just hit me like a ton of bricks and I had to leave work early. I have been having terrible nightmares for the past 3 to 4 days while sleeping. I have had 3 different people ask me at 3 different times today if I'm pregnant. I just had my period for February and I know you can have one while pregnant but I don't want to be disappointed by taking a test and it coming back negative. should I just go and take a test anyways. I'm extremely tired the past week but it could also just be the fact of having bad dreams while trying to sleep at night.