Advice regarding birth control pills

I am 17 years old and have a boyfriend with whom I had intercourse. Last month my period was late, I was very scared and I thought I was pregnant. In the end, I was not pregnant, but I became very afraid of getting pregnant. Can I use birth control pills? Do I really have to go to the doctor for pills or are there some I can buy myself. I have heard that pills can make you fat, and I would not want that. Are there some pills that do not make you fat? What would you recommend to me? Thank you very much.

In adolescence, it is necessary to use the safest methods of protection against pregnancy, and that is hormonal contraception. With such safe protection, you will no longer be afraid of a possible pregnancy. Since you have already had sexual intercourse, you need to contact a gynaecologist for an examination that begins during the first year after becoming sexually active. The gynaecological examination is painless, a swab is taken from the cervix (the PAP test), and you will also receive a recommendation for taking laboratory testing. After that, the gynaecologist will give you detailed instructions on which type of contraceptive pills you will use, and he / she will make appointments for your later regular check-ups. Modern birth control pills have a low content of hormones, they do not make you fat, and the gynaecologist will explain all this in detail.