You are fine to use it. It does not penetrate all the way into the skin. It stays on The top layers.
I'm sure it wouldn't hurt, but I personally wouldn't risk it. As soon as I found out I was pregnant I cancelled my spray tan membership and my doctor told me it was the right decision. There are chemicals in any types of lotions and skin creames but being as the sunless tanner dyes your skin... I wouldn't risk it