Am I just being paranoid?

Ok so I'm 38 days late on my period. I've felt faint, sick, tiered, back pains you name it! So anyways I've done like 3 tests and all come back negative!! My periods are always on time! I fell pregnant before but I had a miscarriage. I have a gut feeling I am pregnant but it says negative? Am I just over thinking it and getting all the symptoms or what I don't know what to do! Doctors are so busy can't get appointment please help.😘