• Josh, Meredith Grace and Anna Duggar

Josh, Meredith Grace and Anna Duggar (Photo : Twitter/joshduggar)

"19 Kids and Counting" alum Anna Duggar recently suffered from an STD scare.

According to Life & Style, Duggar was the one who decided to have herself checked for STD after hearing about her husband Josh's unfaithfulness.

Since Duggar has only had sex with her husband, she was certain that she was clean. Unfortunately, the same wasn't the case with Josh.

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A few months ago, Josh admitted to having two paid accounts on the extramarital affair site Ashley Madison.

He also revealed that he had sex with a porn star named Danica Dillon, and refused to wear a condom.

Upon learning all of this, Anna went to a facility to check if she doesn't have STD.

"As soon as Anna heard about the porn star, she got tested for STDs," the source said.

The insider added that Duggar has some doubts as to whether or not Dillon is telling the whole truth about Josh, but still decided to get tested.

"Anna still doesn't believe the porn star is telling the truth but if she has to face this in court, and sees it's real, she will be devastated," the source said.

Luckily, when the test results were released, Duggar found out that she's clean.

Meanwhile, Duggar will open up for the first time ever about her husband's cheating, pornography and sexual molestation scandals on "Counting On."

The reality TV star will not headline the show, but a teaser releasd by TLC showed an emotional Duggar talking about her husband's scandalous acts.

"Counting On" will premiere on TLC on Dec. 3.