T's are not mind readers. They don't know if you want them to reply, or you are simply sharing.
T's also operate under some very good ethical guidelines. While it's perfectly alright, if the T has opened it up to receive emails or messages from their patients, for the patient to do that, it is not automatically okay for the T to respond. Some Ts might actually operate under the opinion that unless the patient requests the T contact them, it is unethical for them to do so. Right or wrong, many Ts feel this way.

The best way to prevent any confusion is to discuss this with your own therapist, and share that you have trouble asking for help, and that if you do call or contact them, you do want a reply. Otherwise, you need to garner the strength to ask for a reply in your message.