right before your period and diring your period are actually possibly the most unlikely times to get pregnant. you ovulate in the middle of your cycle which is about 14 days before your period. while there is still a chance of pregnancy its less likely than if it were to ave been in the middle of your cycle.
most women dont get morning sickness until about 6 weeks into their pregnancy, although some women get it immediately.
if you miss your period this time take a test.
if you continue to not feel good see a doctor.