Lupse Lady

Hi, New here and not found any like issues when searching this site. Apologies if this has been discussed before. My problem is that after I have driven a few km, the throttle loses response completely. I have to stop and restart after which it drives a km or so and then the same happens. This problem started a couple of days ago. My drive home from the shops took me 5-6 restarts. It does not seem to be at any specific speed as it has cut out both in 80km and 40km speed zones. I hope someone can give me pointers to what might be the problem. Thanks from Lupse Lady