Hey there lovely
How exciting to be trying for another baby - I can tell you that the mid cycle bleeding is
called ovulation bleeding - I experienced it a couple of times and I guess when you are TTC you check out your CM so much more than usual so you notice things like this. If you google it you will get a good explanation. If it doesnt sound like what you have experienced mention it to your doctor to be sure but that's what it sounds like to me. So a positive sign that you are ovulating yipeeeeeeeee
Best of luck

Anna