My husband and I are trying to get pregnant and I have not had my period for almost 3 months now (I am rarely regular though), I have had sore boobs for about 2-3 weeks straight and I am bloated and cramping at times, and then other times I'm not bloated or cramping. I have taken 3 pregnancy tests all saying negative. I need some advice please! Is it still possible I could be pregnant and just not have high enough hormones to get a positive pregnancy test?

I'm 21, I exercise regularly, I eat healthy, I take vitamins

Also... can caffeine intake hinder the process of getting pregnant, I drink about 1 diet coke a day

This a question for your doctor. There is no one here that can tell you whether you are pregnant. However, you are experiencing a few symptoms. This could also be hopeful feelings making you assume that these are pregnancy symptoms when they could be something else. Hence, why you should ask your doctor.

I don't think caffeine can hinder pregnancy... although, I'm no professional.