So I thought there was a chance I could be pregnant since me and my boyfriend havent been using any forms of birth control and my last period was late and really short but now my period for this month is late too but all the hpt's I took came up negative and I just had this feeling that I might be cuz I keep getting nauseous randomly and headaches all the time and I'll get crazy tired out of nowhere and be fine in a couple hours plus im super moody and nothing I do seems to help but I went and got a blood test done and it came up negative so I wasnt to worried but I still felt pregnant so I took another hpt like a week later and it was negative for about 10-12 minutes and got very faintly positive but theres no way I could be since the blood test was negative right?