Post Op Circumcision Concerns - Need quick answers.

I have four questions actually. Three days ago I had a circumcision done for medical reasons. There are a number of things that are concerning me.

1. Right under the head of my penis I am very, very bruised a dark purple color. Is this normal? If so, when can I expect it to heal?

2. It seems two stitches have come out and the skin has become puffed where they came out. Is this something to worry about, or is it alright? (Mostly worried about it not healing right, or very ugly scars.)

3. Under the head of my penis, right on the stitch lines where the frenulum would be, I am secreting a slightly yellow substance. I have no idea what this is, or if it should even be any concern at all.

4. It hurts whenever I urinate. Is this normal?