Bootstrap3 navbar-fixed-top height

I'm using bootstrap3 with navbar-fixed-top in my project. In mentioned navbar, there is a DIV which height is about 700px and this makes entire navbar stretch for this 700px and covers my content (I'm not able to click inside inputs of main container).

Can somebody help to set the overflow parameter properly, so my element inside navbar doesn't stretch entire navbar, however stays "outside" of it?

<nav class="navbar navbar-default navbar-fixed-top">
 ...
 <my-custom-widget></my-custom-widget> <!-- this is the widget with height of 700px -->
 ...
</nav>

Thanks.

G.