Any time that you notice any type of vaginal bleeding or spotting it is very important to get it checked out by your doctor. It could be the start of an infection or it could be a small tear. I would calll and make an appointment and just get it checked out. It is always better to be safe rather then sorry. I hope this helps and I wish you luck
It is possible to become pregnant as soon as your period starts up after your last pregnancy. Your body is officially back to working and you can very well get pregnant again even this early. It is hard to say what exactly it could be just because it could be many things including nothing. I would say any time you have bleeding it is better to be safe and get it checked out. It might be an infection starting and maybe it is just very early and you haven't felt other symptoms. The doctor could take a urine sample and see if you have a bladder infection brewing. They can also do a blood test to test for pregnancy. It also just be a small tear from having sex and maybe not being fully healed although you should be healed up at this point. I hope this has helped you and I still feel it is important to go to the doctor and test your urine and get blood work done.