In the second round of 5mg isotretinoin program. But never have the chance to check for liver, is it bad?

After using the first 4 months isotretinoin i got all my acne clear out. Then my face started to be oily again and started breaking out, then i took another 4 months with 5 mg, but i never check on my liver condition, and now i'm afraid as i read that isotretinoin can be bad for the liver. I don't drink or smoke but i started feel the symptoms of chron's disease like explained in the internet such as bloating, and fatigue. Any suggestions?

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