Yes, you could be pregnant. Certainly so given how many times you mention you had unprotected sex. Home pregnancy tests these days can be very effective. However, depending on where you are in your cycle when you took the test, it could show as negative even if you are pregnant. As others suggested, I would make an appointment to see your doctor for a blood test.Even better methods of birth control (condoms, the pill, patches, etc) have anywhere up to 25% chance of failure to prevent pregnancy. So I'm sure you can imagine how ineffective pulling out is. If you are not in a situation where pregnancy would be a wanted outcome, please get yourself and your partner reliable brith control. If you cannot afford it, there are Planned Pregnancy and other clinics that provide contraception at affordable (sometimes free!) prices based on your salary. I'm not trying to pile on or berate you, I just want you to know you have options.