none-ask your health adviser.
What kind of pills? Most pregnant women don't need pills.
prenatal vitamins
ask your doctor
What kind of diet pills??? Dr. Dan
ask your doctor
If you didn't get your period, you should take a home test or go see a doctor. You may be pregnant. If this is your first month or two on this kind of pill, you may need to go to the doctor and get a new kind. It may not be the correct dose for you.
Taking diet pills while pregnant isn't a good idea, no matter what kind they are. You definitely need to go see your O.B. asap to let her/him assess the situation.
you should NEVER mix pills! any kind of pill could have un documented side effects when injested with other pills or drugs, for example alcohol mixed with anti-depressant pills can cause you severe thought of self-mutilation of suicide, not that anti-depressants already give the user suicidal thoughts as a side effect.
Gynecologist.
Yes. But only if the condom broke or was expired. You should also be on some kind of birth control pills. I reccomend Yaz . With both, pregnancy is at such a low rate you have no need to worry.
niacin
If you and your potential baby's father are young and healthy, I would wait on the fertility pills..you should learn to track your fertility using the basal body temp and cervical mucus methods...all easy to learn by reading....if after 6 months to one year of this not producing a pregancy, then maybe fertility pills, or fertility help of any kind would be helpful...good luck