Questions about Modafinil

Hello friends, I recently, "acquired" some Modafinil and would like to know some things about it. Mainly, I want to know if it will be obvious I am on something. I plan to take around 200mg to help with fatigue and to offer some mild stimulation. I do not want to look like I am tweaking, so I have some questions. Will Modafinil dilate my pupils? I couldn't find any solid information on this. It's okay if they get a little bigger, but I can't have dinner plate, MDMA pupils when I'm around colleagues. Likewise, will I be acting erratically in any way? Or, in any way that couldn't easily be explained as having had too much coffee (I don't drink coffee often at all, so no one would be surprised if I was acting off due to it). Also, lastly, if I took a pill (200mg) at ~5:40AM, when would I be able to go to sleep again?

These seem like kind of silly questions, but I would really rather be safe than sorry. I doubt these things would be problems at all, based on what I have read, but I do not want to screw up.

Thanks!

EDIT: I appreciate all of the advice. It worked great! Today has been a good day. Thanks guys :)