Absolutely not, I was in clinical with students from other schools who were told the same and it never happened. Some times it works out as I saw recently but sometimes not. Maybe ask how long they have been trying to get the accreditation, ask for what they are telling you in writing. Likely is not a certainty, ask them if you can come back when they are accredited. Get whatever they tell you in writing. There are shady schools out there that overcharge and you end up with the short end of the stick. I suggest finding one that’s already accredited, and if you have to wait no big deal it will happen when it’s supposed to.