Should I take a pregnancy test?

Okay so I posted before about having a weird period. The length of the period was about the same as normal (5-6 days) but my symptoms are very odd. My period ended and I’m still experiencing symptoms. I have lower back pain, nausea, headache, gas, aversion to certain foods, and I’m an emotional mess. Also, I’m a petite woman whose stomach is typically relatively flat. But recently my stomach has gotten hardish and rounder than normal.

I got my period but I just can’t shake the feeling. Should I take a test?