Hey Dominik! I've felt like this so many times in the past, and it's usually just before a 'light-bulb moment' in my playing.
When you're improvising, you want to have things practiced so much that any time you're playing over a chord progression, that you don't have to think of any theory. It's sorta like trying to have a conversation in a foreign language while referring to a dictionary, it'll only leave you stopping and starting. You basically want to know what the notes you are about to play will sound like before you play them. Kind of like if you were singing over some chords, all of your notes would be authentic, and controlled by your ear, not just your knowledge.
That's great that you have your Minor Pentatonic all over the neck! You can do so much with just that scale alone improvisation wise.
Here are some Minor Pentatonic hacks/Soloing hacks to get your teeth into (Try sticking on an A minor jam track and doing these) :
1.
Sliding to each note in the scale from a fret behind/half-step below.
2.
Adding the b5/Blue note into your scale in every shape (Look up A minor blues scale - it's a Minor Pentatonic with the extra note added)
3.
Try playing E minor Pentatonic over the track instead of A min - This is a bit of
Pentatonic superimposition (sounds complicated but isn't) this will mean you're adding the notes E G A B D over the A minor harmony, which will give your solo a different color. You are basically borrowing the pentatonic scale from the 5th chord in A natural minor.
4.
Look up some Major and Minor Arpeggio shapes and try playing these over the track: A minor arpeggio, C Major arpeggio, E minor arpeggio, G major arpeggio. (You can use the sliding from a halfstep below technique with these too)
5.
Try singing or humming something over the track, then try and figure out what you sang on the fretboard. Don't worry about it being fancy, just make sure you like it, and then try and copy it.
I'd be better explaining exactly how I get this approach in a private message, as I don't want to write a book in this post haha! Basically there's a really logical way of looking at a Key that gives you these options
Hope this helps!