Some times I come across strange problem which is I didn't feel comfortable enough to speak with persons in my colony or my workplace. At that time I feel feared and even views to share or words didn't comes in my mind and I feel very uncomfortable. This happens only sometimes and not always but I didn't know what can be reason that cause me so feared and uncomfortable even talk with someone.
I think the issue you are having exists because:
- You are inexperienced speaking in front of groups which leads to anxiety more often than not.
- You are not as knowledgeable in a particular topic as you feel you should be
- You are not adequately prepared to speak in front of a group of people (i.e. you do not plan what you want to say ahead of time)
Fortunately, this is completely normal and happens to everyone at some level. I think the main thing that can help you in this place is practice.
Take some extra time and make a plan for what you want to say in a meeting, establish a goal and work towards that. Also, make sure you know enough about a particular topic to feel comfortable talking about it or at least know the right questions to ask.
Also, practicing speaking in front of people in general will help you with this as well. Practice a 30 second elevator pitch of who you are and what you do. Practice in front of a spouse/friend/mentor who won't judge you and have them give you honest feedback.
Speaking in front of others is a skill that must be practiced and honed. Even Steve Jobs, one of the best speakers to ever walk the planet practiced obsessively until everything was perfect.