B7 cabrio final

Hi guys, I’m looking for some insight on my problem. It simply started as I pulled out from a car park, I accelerated maybe a little faster than usual nothing extreme, and all of a sudden I lost power. I pulled up for a minute contemplating my life 😂 then proceeded to try and pull away and managed to do so and get home about a mile away. Now the issue is the car is shuddering under acceleration. If I take it really slow through first gear I can avoid it but I mean really quite slow, then I to second again keeping it very low revs and slow paced but trying to accelerate at a normal pace it will shudder quite bad. This happened a few weeks ago and since it’s been parked up. I did notice a small oil leak on the floor under the gearbox and the gearbox casing is slightly wet. I just not sure if I should be expecting it to be a slipping clutch pack or just low hydraulic pressure due to fluid loss but as I mentioned it happened suddenly just pulling out of a car park. Anyway key information: (multitronic gearbox, CVT, driven 97,000 miles and no record of a gearbox service at all) hope someone has some helpful information