salam zs101
i liked how you said 'by the grace of Allah' even if its an interview request. Thank God you guys heard from the embassy ..InshAllah you will do well at the interview..this is your chance to be heard and make good use of the opportunity presented to you. Sicne it is end of july, you have plenty of time to prepare for interview, but also do lots of duas that everything goes well and give sadaqah.
I believe you also ordered caips notes last month..I am pretty sure you should receive them by now. Please go through them and sutdy where your case currently stands..
They haven't sent you a re-medical request because they'll do it after the interview and inshAllah it will be a remed + ppr for you. May Allah reunite you with your wife. Ameen