Hi, me and my boyfriend had sexual intercourse on the 27th, and the first day of my period that month was on the 13th. We are worried that he did not backed out on time, also we do not use any kind of protection. Does the penis have to be all the way in , in order to get a woman pregnant? Are the risks high for pregnancy and if so when will the implantation take place? Does the symptoms occur early?
Thanks

Any time a penis is inserted into a vagina there is a risk of pregnancy. Since you are not using protection, the risk is increased ten-fold. You will now have to wait to see if your period comes as expected.

How old are you both? Yes, you can get pregnant because you had sex. You will have to wait until you miss your next period. Wait two weeks after the missed period and take a pregnancy test with your first morning urine.

No, the penis does not have to be all the way in.
You can get pregnant any day of your cycle, but you had sex right in the middle of a typical cycle, so that increases the chances.
Symptoms won't appear right away (if at all) and they vary a lot, and are very similar to menstrual cycle. You cannot go by them at all. All you can do is test.

This is all pretty basic knowledge, so I hope you abstain until you get birth control, unless you are trying to get pregnant.
Did you know that in the US, the most babies are born in September, hence conceived right about now?

Did you know that in the US, the most babies are born in September, hence conceived right about now?

Yup, September through December are my busiest months. I usually work 6 days a week through those months. We can't forget New Years, Valentines Day and St. Patricks Day.