hes gay
No
No, a female can not be impregnated unless she is at the eustrus stage of heat, which is the second stage of four stages during heat.
No, most veterinarians will not agree to spay a female whilst she is in heat. Wait until she has finished her heat cycle before spaying.
Talk to your vet about this.
A female dog (of any breed) first goes into heat sometime around the 6th,7th, or 8th month of age. There's no way to predict when. For this reason, it's best to have a female dog spayed before her 6th month of age. Female dogs get significant health benefits when they're spayed before the onset of their first heat cycle.
No, referring to a female cat in heat as a "slut" is inappropriate and disrespectful. It is more accurate to call a female cat in heat simply that - a female cat in heat.
Minimum 2nd heat, preferably 3rd or4th.
No, they get pregnant about 3or4 days into the bleed
Yes, a female no longer goes into heat if they are pregnant.
Sigh of a female human being in heat
No. Only a male can impregnate a female. No female mammal of any species can get another female pregnant. For mammals that have a "heat" cycle, being in "heat" is required for pregnancy by a male. If such a mammal (a dog for instance) is not in heat or doesn't have a male partner, pregnancy is not possible.