Protected vaginal sex with condom following oral sex
is quite safe against unwanted pregnancy
if you were not involve in sex around fertile days. Condom has failure rate around 14% and it depends on ovulation time.
Here, you should undergo one home pregnancy test after your missed period and do a blood test
for beta-HCG to confirm the same.
Take healthy diet, avoid stress
, drink plenty of water, maintain genital hygiene and take a sound sleep.
Be well and practice safe sex in future.