Maybe Pregnant?

Hey everyone, so I'm not sure what to think.. I had my period beginning of June (6th or 7th), my boyfriend and I had sex on July 1st and 3rd, it's now the 17th and no period. I went to a free clinic where they did a quick test and it came back negative. I'm pretty regular and usually have heavy periods with extreme abdominal cramps and my breasts will hurt a little. But let me tell y'all they feel like they grew 2 sizes and I'm miserable! 😖 they hurt all day which isn't normal with my period pains. I'm not getting crams either, I'm so confused and don't really have any women I can ask about this kind of thing. If anyone wouldn't mind maybe shedding some light for me ❤️❤️❤️