Whitney Purvis has double the difficulty with the authorities — not solely was the “16 and Pregnant” star picked up by native police, however the feds additionally arrested her and are actually investigating the case … TMZ has discovered.

Jae W. Chung, Appearing Particular Agent in Cost of the federal Drug Enforcement Administration, tells TMZ … Whitney was busted Monday by Atlanta-based DEA brokers and officers from the Rome Police Division in Georgia.

As we first reported …Whitney was hit with state costs of involuntary manslaughter and drug offenses in reference to the fentanyl demise of John Mark Davis.

Chung says the investigation is ongoing and a part of a broader crackdown on fentanyl-related deaths. He notes that almost 70% of all drug fatalities within the U.S. at present contain artificial opioids like fentanyl.

Rome PD officers say Harris died from a poisonous overdose after Whitney allegedly distributed a strong combo of fentanyl and xylazine, generally identified on the road as “Tranq.”