should i go back to the dr at a later date?

so, i've been getting "pregnant" result when i take a digital test & when i've taken the regular one with lines they've been extremely faint! anyway, today i went to the dr & hospital (hospital also did bloodwork work) & they both said im not pregnant via urine sample. mind you two of these tests were taken after leaving the hospital. is it possible the lines are just to faint for them to see? i’ve read that dr & hospital tests aren’t as sensitive. i also go to quest diagnostics tm to do blood work there as well, should i retest in a few days? what should i do?