Dear thanks for query.Andrologist a doctor who deals with hormonal problems.Sexologist
may be a psychiatrist
or some medical doctor
.If you have problem related to hormonal deficiency
you should consult andrologist.If you have problems related to sexual act it self then sexologist are better.But a word of caution you can easily verify degree of an andrologist but there are many so called quack sexologist without any degree or with some mysterious degree.So it better to ask your doctor about local situation he will guide you properly.