Hello My Friend Recently Told Me That She Had Taken

hello my friend recently told me that she had taken too much of the recommended dose of extra strength Tylenol. she took 20 the first day and then two days later she took 10 more. se hasn't had any symptoms and she says that's due to her being overweight and that the amount she took didn't affect her. its been over a two months now and she says that some times her stomach hurts. Should she go see a doctor