Low hcg

Bridgette • 22. Registered Nurse. 💉💊 Married 3/5/2019 💍💕 Angel baby 9/16/2018 🌈💕👼 Momma to Rylee Meadow 8/30/2018 🍼❤🎀

So I should be 6 weeks and 4 days according to my LMP. I had my first quanitative HCG drawn on 9/8 and it was 53.24. I had another drawn yesterday (9/13) and it was only 84. This would be my first pregnancy and I'm very nervous by these numbers. Any insight? Thanks in advance