The symptoms of early
pregnancy are:
1. Missing a period
2. Nausea and
vomiting of pregnancy
3. Frequency of urination
4. Breast symptoms: Engorgement, heaviness, tenderness, darkening of nipple and
areola (in first pregnancy and remains life time there after), secretions after squeezing.
Of course all these cannot be relied upon singly and need confirmation by:
1. Clinical examination by an Obstetrician
2. Urine pregnancy Test
3.
Ultrasonography.
However, you had sex on the day next to her stoppage of menses. The chances of pregnancy with that intercourse are very very remote.
moreover, she has taken Ipill within 24 hours. This is very reliable method of
contraception.
I do not think you have to worry about pregnancy due to this intercourse even if the condom was torn.
Wait patiently. She will get menses. If she does not, get the urine tested for pregnancy after about 8-10 days after the missed period and/or ultrasonography to diagnose the pregnancy if at all.