Dear Mr I am assuming that it is you (husband) on medication. If so, there won't be any problems or effects on conceiving due to medication, although some people may experience sexual side effects due to medication. However, anxiety and depression condition itself may cause sexual problems. But what is even more important here is to be aware of the impact from your symptoms itself. The nature, severity of symptoms, impact, support system, response to treatment etc needs to addressed.
It is these things that determines how you cope with having another child in the context of your condition, plus the demand and responsibility that comes with another child.
I suggest you meet a psychologist to get the psychological assessment and discuss these things including setting up support system and appropriate treatment.
Next Steps
Consult Psychologist for Assessment, we could help you
Health Tips
Need to do relaxation or kriya exercises for overcoming anxiety.