Is it ok to use pregnancy test on my cycle day 18?

I wanna share my symptoms lang after my period. As in pagkatapos ng period ko saka sumakit boobs ko (but can tolerate) . Constipated, feeling pagod at paguwi antok lagi no energy to do other things, dizziness / motion sickness, lower abdominal pain, mood swings (as in grabe), 8 days din umabot yung menstruation ko this May. #pregnancy