I just googled sucralose and there are as many bad links for it as good ones. If I'm not sure about something because of conflicting evidence I'd rather leave it alone becaues there are alternatives I can take which are known to not be harmful and work.
i.e. grapefruitseed extract (which they use in some hospitals to clean operating theatres rather than antibacterial agents)
P' d'Arco (taken from the immune system of a tree)
propolis (a bee remedy)
These are all natural and so I trust them.
Please let us know how you get on. You might decide you want to try 'natural' yourself.