There is no harm in crying if it is simply tears coming from the eyes, without wailing. This is based on the Prophet (sallallaahu ‘alaihi-wasallam) statement , when his son Ibrahim died,
''The eyes shed tears, the heart grieves but we do not say anything except what is pleasing to Allah. We are by your departure Ibrahim, certainly grieved. 
Hadith with that meaning are many. There is no harm in your talking to your relatives and friends about your disease as long as you Praise Allah, thank Him, and extol Him, and ask Him for health, following the permissible means. We advise you to have patience and hope for reward from Allah. I give you glad tidings, as Allah has stated,
''Only those who are patient shall receive their rewards in full without reckoning.” (Surah al-Zumar:10)
The Prophet (sallallaahu ‘alaihi-wasallam) also said,
''A Muslim is not afflicted with fatigue, sorrow, disease, sadness, or hurt, even if it be a prick of a thorn, except that due to it Allah expiates some of his sins.” 
The Messenger of Allah (sallallaahu ‘alaihi-wasallam) also said,
''If Allah wants good for a person, he afflicts him with trials.” 
We ask Allah to grant you a cure and health, as well as goodness of the heart and deeds. Verily He is the Hearer the Responder.
 Recorded by al-Bukhari, and Muslim.
 Recorded by al-Bukhari, and Muslim has something similar to it.
 Recorded by al-Bukhari.