Sorry to be the bearer of bad news but yes it is possible. Especially if there was sperm in the condom. But think of it this way, the male genitals were in contact with the condom and whatever disease he may have could spread from the condom into the vagina. It also depends how long it was stuck i there too. The longer it was in there, the more at risk you are. All the best.
Yes you can to avoid STD and pregnancy
Yes it will protect you from a STD.
No she can not.
The IUD will provide the same protection against pregnancy. As usual, it won't provide protection against sexually transmissible infection.
She is stating she is free from a STD, but don't believe her, use a condom.
This probably means that you have an STD (Sexually Transmitted Disease)
Yes, abstinence is 100% effective, but failing that use a condom.
Eliminate the risk? No. But it will greatly REDUCE the risk.
You should be good as long as you have a condom on it. Bradispro
Yes if no egg is released. But I wouldn't risk it if I were you. Get the morning after pill, available within 72 hours. Take a pregnancy test 2 weeks after.
Describe what to do if food gets stuck in an appliance.
Provided the condom doesn't burst during intercourse - then no ! The condom is the most reliable form of contraception (apart from abstinence of course !) It's also the best way to avoid getting STD's !