Is It Time To Test?

Sammy

I had unprotected sex on August 17( also September 1st and 2nd but it was after my period was supposed to come). I was supposed to get my period on the 31st it never came I haven’t been feeling many symptoms though only frequent urination light cramping back ache and a little light headedness and nausea. Also my periods have been irregular before one time it didn’t come for almost a whole month. Is it time to test?