I wouldn't say it would be outright absolutely impossible, but I highly suspect if the second application was also refused, a visitor visa would be decidedly difficult to obtain.
That being said, I know it's easy to say from my end, but try to take a deep breath and get your mind away from thinking about it and going in vicious circles about the what-ifs. Fretting about it won't make a difference and will only negatively have an impact on YOU. We have great faith in Medivisas, and I'm sure you've been steered in the absolute right direction.

Hang in there!!