No you can't use it for your 2 months old baby. According to Dr Gbemi it is safe for babies from 3 months and above though it is best to use mosquito treated nets as the repellent cream might be harsh on your baby's skin.

It is safe to use for babies from 3 months

A weak and pale child needs urgent medical attention. Kindly see a doctor preferably a Paediatrician for thorough evaluation and treatment.

Good day ma'am, the treatment of rashes depends on the type and causes
and can only be determined by a doctor. Please take the child to the
hospital for thorough evaluation and treatment.

Yes, you can use it as it is safe to use for babies from 3 months