First real delusion.

I was always told that I had schizo-affective disorder but I never believed them. Then I walk into my first grad level engineering class in which 80% of the students are on visas from China. My first thought is the Chinese are here to steal our secrets and are waging an economic war on us. I am the the soldier that must protect the US by studying really hard and getting better grades then them. I talked to my dad and he agreed with me just making the delusion worse. I wasn't until I told my Dr. and had a med adjustment that I realized that I was wrong.

Wow. Nice

I'm glad you realised you were wrong. Sometimes delusions can be scary and it doesn't help if people enable your thought processes at the time.

I don't think it's that serious unless you believed that first thought wholeheartedly.
It'd be scary and probably dangerous if that continued. Get it checked out asap