If I were you,I should've said : 1- I'm not feeling well ;Because I'm suffering from sever stomachache and hoarseness of voice , I can't call you to inform you that...... 2- I send you this mail is to inform you that because I'm still ill,I wasn't able to (I think better say I couldn't) come to the office even today. Hope someone can reply and correct me if I'm wrong,thanks.
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I won't be able to come office today as i m suffering from severe abdominal pain.