Pregnant ?

I have heaps! Of pregnancy symptoms such as

Constant urination , bloating , fatigue and morning sickness and a really weird appetite . If I am pregnant I would be about three weeks but I did a test a week and a half after the actual sex and it was negative . I did have a blood test a week after the sex too and it was negative . Could I possibly be pregnant ? I don't want to take another test and get a negative