Here's something I hope beyond hope is not a minor disaster? I found myself in a situation on a dark street in NYC very early yesterday morning with low mist/fog, trying to document the life of an older homeless women I've been following and working with for a while now, and only had Delta 100 with me. I had to push the film, 200 was just not going to work with the lighting and what was going on at the moment, so I had to push to 400... thinking I could ... Problem is, now looking through everything I have I can find nothing in terms of chemical and timings, etc...that tells I could do this...HELP!!!! What do I do? Can I process this at 400? Man, I hope this is not a lost roll of film.....