Swamp blow when you hook in again – clutch or something else

Hello, For some time now, when I switch the gears e.g. into the 2 gears, when I let the clutch pedal come back, so plug in, a dull blow. Strangely, the most in the 2.,3. and 4th gears in the 5th gear not, as well as when starting in the 1st gear. If I give abruptly gas, then there is also this blow. If I do the coupling quite carefully then I hardly make it at all. Also, the shift stick moves extremely, but as I read I don’t know if there’s a clutch defect or something worse. Drive shaft, bearing or something. Who can give me a tip or help me?Thank you. Andreas