Welcome to HCM.
If you did unprotected intercourse
around ovulation time (as you told),then high chance of pregnancy
is present. Do a home pregnancy test with urine after 1 wk of missed period.
Check result and consult to your doctor. Then do periodic check up if you become pregnant.
In this time,nausea,vomiting
and slight stomach problem are present. Avoid pungent smell or odor and some foods that causing it.
Take folic acid
and Doxinate tab up to 3-4 months.Take protein rich diet,avoid long journey & heavy work, need proper sleep.