Took creatine, feel really nauseous

Yo! I’ve been taking creatine for a couple of weeks. The container said to take it 4 times a day for the first week which I did, and then I’ve been taking it once about half an hour before I work out each day. I usually mix it with a drink but today I decided to just scoop it and then wash it down with tea. I worked out for about 20 minutes before I started feeling really nauseous. It’s been about half and hour since then and the nausea is still here, I’ve got an intense amount of anxiety, and my head is starting to hurt. Does anyone know why this is happening?? Google said these are normal side effects, but that I would have noticed them before today. Cheers!