I need help understanding the use of OPK's and time of ovulation.
Here's my scenario:
Using Clear Blue easy OPK
Sunday - 7pm OPK, negative (empty circle)
Monday - 6am negative OP stick (empty circle) Had sex in am.
Monday - 7:21pm positive OP stick

Husband wasn't up to evening sex.

:
Tuesday -5:17pm positive OP stick

Husband still wasn't up to evening sex.
Wednesday
4:30AM 
Husband finally down for sex.
Wednesday 6:00am negative OP stick (empty circle)
Currently, (like right now at this moment (1:52pm) I am still having my usual little pangs I get when I ovulate.
So what I want to know:
1. Do you only get the the

when ovulation is coming (like 24-36 hours it talks about)?
2. When the egg has dropped do you still get a smiley face?
3. Can I assume that the empty circle (negative stick) means ovulation is over? --or the egg has just dropped and it will be there waiting for about 24 hours for fertilization?
Should I have sex again tonight?
