Thanks guys!
I know that my dive instructor suggested waiting 24 hours, but that was for non-decompression dives. As I get into the technical stuff, I have to decompress occasionally, and the effect might be worse. After those dives, would you think that 48 hours is enough?
Yes, diving is quite expensive, and quite addictive. I never thought that I would buy my own gear, I couldn't seem to justify it to myself. Eventually my parents told me if I didn't buy it now, I would never buy it. I find that it is a really relaxing activity, so I found the justification that I needed. But now it clashes with my other goal, to be a pilot. Why do things like this always seem to happen? Ah well, that's life....