Finally I saw my doctor yesterday and was told problaly my breasts pains and long period was because…

Finally I saw my doctor yesterday and was told problaly my breasts pains and long period was because of hormonal unbalance. She prescribed me the anticonceptive pills to regulate my period. Urine PT test came back negative. She ordered some blood test to check for my hormones and thyroid. I noticed she requested a HCG blood test, just wonder why and if is rutine ? Since the urine test was negative i feel like there is no need😔