15w1d cramping and brown spotting....

I feel groggy almost like my period is coming. I’ve been drinking a ton of water. There’s brown discharge in my underwear but not when I wipe. I’m just annoyed and frustrated.

It’s came and gone this entire pregnancy.. 7-10 weeks then again at 12-13 and now again. Is this normal? Is it normal to feel groggy like period is coming too?