I know the way you feel but your behaviour is extremely risky and if you continue along this path, you might end up with unwanted consequences.
By the way, why should you give a guy head just because he asks? Self-esteem alert!
You should get a copy of my book, Asha's Letter, sex Ed for Teen Girls. It will put things in perspective for you.
If he only had his tip inside you and did not ejaculate the chances are very low that you are pregnant. Still to just be safe you can get a pregnancy test for about 12 dollars at any store. Plz next time be sure to use a condom and birth control. You can even get BC without patental consent in most states if you are uneasy talking to your mom about such things. Dont take chances next time. The risk of getting pregnant or an STI is NOT worth it!!! Not when you can avoid these things so easily. And dont listen to ppl who tell you contraception does not guaranteeyoubwont get pregnant. Theyre just trying to scare u into not having sex at all. With BC and condoms it is nearly impossible to become pregnant. Certain stis like herpes can still be passed with male condoms since there us still skin to skin contact at the base but therevare ways be safe. Do your research, talk to a DR and be safe out there :)
I am glad you included that you are aware that you should not have done anything if you were not ready. However, I am afraid your thought might have fell short. You obviously are not ready to tell your mom the happy news. You probably are not ready to be a mom yourself. Also, are you ready to be a single mom, having to drop out of school to care for a child and not having a better life. Are you really ready?
Even with a condom or even birth control pills you still have a percentage of opportunity to get pregnant.
Now beyond that, we will have to read between the lines of your details and give you some information based on what we assume you have described. I am assuming by your statement there was not full penetration, that he knew nothing about making love, that he did not ejaculate in you, that your hymen is not in tact and that you are very concerned.
If these assumptions are correct, precum isolated to itself cannot get you pregnant. However, many times some sperm might escape prior to full ejaculation. If sperm is deposited inside the vagina with precum, even if not deep, it has a possibility of getting you pregnant if your hymen is not in tact. These are low percentage but it can occur.
If you have your next period, breath a sigh of relief and think all the way through READY next time.
If you want some further guiding conversation feel free to message me. Sometimes just having someone to be open with helps. I will not be judgemental and always give you the truth.