delayed but negative

Normal lang po ba ma delay? Delayed na po ako ng 1 month and 2 weeks. Nag PT na po ako ng March 2, March 12 at March 13 all Negative po. Normal lng po kaya na ma delay? First time lang po kasi mangyari sakin to. At aside from urine test po may iba pa po kaya na pwede pang test? Thank you po sa sasagot