Should I get tested for COVID?

I had Covid back in February. It just felt like a common cold. As of October I am fully vaccinated. Last night I noticed my throat was getting sore so I drunk tea. This morning I woke up to my nose running and my throat still sore. I am also having some back pain.  I asked my fiancé if he thinks I should get tested but he doubts I have Covid. Should I get tested anyway? I do work in a school, directly with children that refuse to wear their masks. Teachers also lower it whenever. What do you guys think?

Update: I called out and got tested. I’m definitely sick but it’s not COVID. My throat is just killing me. It feels raw.