I would get that looked at by a vet but in the mean time I would put a cold pack on it and see if the swelling goes down

My daughter had the same heart beat she's now three months, 125 is a good heart beat

I would take a test  and you can feel early cramps before your period. But if you are late I would always take test to make sure that your just late

You should always go and see your doc if you are ever unclear with at home results

Yes you can, I had a hard time with my first feeling pregnant but with my second I could feel some changes with my mood in the second week

Give your dogs cooked carrots or you can buy spray breath freshener for dogs or brush their teeth with doggy tooth paste