Silent blocks are one of my biggest adversaries. What I do is do a lead word of sorts. Say a word that you know you can say as quietly as possible, (my word is fuck, swears are very effective. I cannot stress the quietness of this opener haha) this will give you enough momentum to throw yourself through the rest of the sentence. Momentum is your best friend. If possible, when you make it out of the block, try to talk a little louder, supporting your breath while talking is very powerful when it comes to avoiding blocks.