No.
u have one testical
Yes.
Katie has had one miscarraige.
Yes you can. The concern would be what caused your miscarraige and is it likely to cause one again and scar tissue in your uterus from previous abortion. Scar tissue can cause the placenta from attaching correctly.
yup
It is completely normal for one testical to be larger and hang lower than the other - it is typically the left one.
No, one normally hangs a little lower.
Having sex
Could be testicular cancer. Feel around for weird things that shouldn't be there. If nothing is there then it is likely to be just your testicles producing sperm and or semen.
You are not the only one
A lot of guys do. Some are almost on top of each other. That's just the way you are built.