Focusing on the good ideas

Hello!

I'm currently studying communication design (I'm in the 3rd semester now) and I have a big problem with focusing or "funneling" the ideas for projects (private and school). I jump from one concept to another all the time, and while i do create good designs, almost always it happens in a "spur-of-the-moment" type situation and never after thinking it through or when I'm "supposed" to do it (like when im in uni or sitting down especially to do an assignmen/project). Also, theres situations in uni where i just can't seem to get my head around an assignment, and no matter how hard i think it through theres just nothing, almost like i never designed anything in my whole life... That's hella frustrating and also makes me scared that maybe design is just not the right thing for me and that im not creative enough?

Can someone relate? And if yes, do you have any tips on how to deal with this?

thanks for reading!