I’m late...and confused 🤷🏼‍♀️

I was suppose to get my period yesterday but I didn’t. This morning around 10am I went to the bathroom and I saw a small browish red spot on my underwear. I thought ok it’s my period anyways that’s all it was that brownish red dot. I showered and now it’s almost 7pm and I haven’t had anything since that spot at 10am. Meanwhile I’ve been nauseous and have been running to the bathroom to pee. I also have been cramping as well. What does this mean this never has happened before.