"Help! I Can't Pray For A Long Period"

So, in church during the prayer session, and after the prayer topic has been introduced, I find I can't pray for more than 30 seconds, 1 minute tops.

After that, I have nothing else to say. Yet I see others praying until whoever is leading the session intervenes and introduces another prayer topic.

What exactly are they saying for that long or are they just repeating themselves. I can't speak in tongues too, so that doesn't help my cause.

I also cannot pray loudly, I always whisper under my breath even when the pastor says to shout at the top of our voices, because that's just how I am.

Do these things I mentioned n hinder prayers from being answered?

Help