well, you may not see a sudden changes rite away, it takes time i guess on your 1st trimester. its not same on all women. however, dont b too stressed, it could affect the whole body system. you can wait couple more days then take hpt with am urine. :) hope it helps
If you are late for your period you can test now. Not all women have typical pregnancy symptoms or the symptoms show up a few days to a few weeks after finding out they're pregnant. Good luck!