Thank you for reaching out to us.
Natural hair growing from the body is not considered a chatzitzah.
In some cases, it might be preferable to remove such hairs prior to mikveh, as when a woman is very particular about them and usually deliberately removes them beforehand, or would otherwise remove them within a day of immersion. This does not seem to be your case, so you need not be concerned.
Please let us know if we can be of further assistance.