5 positive and 3 negative pregnancy tests

Ok so im really confused right now. May 9 th was my last period. I started getting little symptoms that I might be pregnant so the day before my expected period wich was june 9th I took a home pregnancy test and it came out positive.. One line was lighter than the other so I wasnt sure so I took another one the same day and again a positive with a faint line so again it left me questions so the following day I took another one and it was positive with a faint line. So the next day june 10 th I bought a digital one and it said pregnant. That one was a 2 pack so just for the heck of it I took the other one and again it said pregnant.. I was convinced I was but I went to the health dept june 13 th to get proof of pregnancy and it came back negative so they did a blood test and they saaid there was a very very low number of the hormome.. So im confused and dont know whats going on.. I took a digital test today and another negative .. I have no bleedings or cramps so I dont know what to think.. My breasts are tender and I feel nausea sometimes.. Could I be pregnant or not??