Let me just say, you are not alone in this problem
I have it too
but I noticed that there are somethings that I did , made me better in speaking
I started to read and then
I started to read with sound , instead of reading in silence
also there are some courses and teachers that made me correct and improve my language,
I remember a teacher told us about things like, when you talk try to avoid the word AND
example: I have a lap top and a personal computer and a TV
so the right sentence is : I have a lap top ,personal computer and a TV.
there is another thing to do to reduce the word AND when you speak by using Conjunctions words like :
but, or, nor, for, yet, so ,although, because
I think your problem is easy to solve
you just need to practice