Hello love, it's all so hard isn't it, the not knowing or the what if.  I've been dealing with this for four years, chemotherapy, radiotherapy and now immunotherapy for my husband.  So the deal in one missed treatment should not be too bad, we were told it carries on working after the treatment so missing one is not too bad.  My husband has had bad bloods no treatment but that's because he wouldn't drink the required amount of water because he didn't like water!  He went into a mood and I just told him it was his fault so no one else to blame, not happy with that but started drinking his water!  We try to Mummy them and they hate it because all control has been lost to the cancer so he is old enough to get through this in his own way.  Just act normal and leave him to work through the disappointment.  I see you say Mum of two how old are they?  I've been writing on this forum for four years so feel free to join in if you're having a tough day.  All my best wishes to you, here if you need me.  Carol x