Having suffered severe lupus, it is now calm and we are thinking of starting a family. Should I tell my GP? Will my lupus react to my pregnancy and should I increase my steroids?

From what you say, there seems every chance of a successful pregnancy. Clearly, it is important to know that the lupus is relatively calm, both from the clinical point of view and from the tests, that the blood pressure and kidney function are reasonable and that the anticardiolipin antibody levels are not high (patients with high anticardiolipin antibodies have a higher risk of miscarriage and this can now be largely prevented). There is no specific need to routinely increase the steroids just because of the pregnancy.