Hi there to you both. Technically there are problems with artificially sweetened drinks because the body thinks it is going to get some sustenance when sweetness hits and when it doesn’t it sends out signals that it wants sugar, hence cravings. The fact that it is a chemical also has the effect of the body not disposing of it easily which can cause bloating. As a now and then thing and if you are in control of your carb cravings then I dont see a problem, I cant imagine vodka without tonic and cannot bring myself to have full sugar tonic water (note to self, check carbs and calories in tonic water). However, there have been people on here who have been drinking diet drinks on a regular basis, cant say whether they were okay or not as they dont seem to be around now. Try fizzy water with a hint of unsweetened apple or orange juice, just a touch. I personally like plain water but always start the day with lemon and water.
I dont see the point in making yourself miserable if you cant have a little treat now and then.
By the way there is a lot about this if you look in the Search box, type in diet drinks or similar.