I had a positive beta hcg of 54 after 14 days of et and levels dropped to 0.1. could i still be pregnant

Prenancy test: No. In a normal pregnancy the HCG will double every 1-2 days. Your levels are falling which confirms a loss of a viable pregnancy.

No: A beta HCG level below 10 is not consistent with an ongoing pregnancy. This abrupt decline indicates a very early pregnancy loss sometimes referred to as a "chemical" pregnancy.

No: Except if the lab switched the specimen, you are not pregnant.

Unlikely: The HCG should rise exponentially every 48 hrs in an early pregnancy. A drop in levels suggests that the pregnancy is not going well.