Hi Anjel37. First of all, I'd like to commend you on going through the time and effort to be a foster mother. It is no easy task. I wanted to become a foster mother but my husband and family objected. Oh, well. They'd gone through enough with our handicapped son and they were heart-broken and exhausted.
Your dream directly associates with your feelings about the baby and midnight feedings. It's interesting how you saw "thumbtacks" and not "pins." Thumbtacks are the type of pins used to tack up notices, messages, reminders or work orders on cork board on the job while pins are used to pin things together.
The baby having thumbtacks on her head and mouth indicate that the baby's needs were a weighty responsibility for you. You had to nurture her developmental growth and intellect (head) as well as meet her physical needs (mouth). In your dream, you were capable of taking care of her demands for the immediate time (pulling out the tacks), but you wanted help. As for the woman whose name is Tanya or Taylor, look for someone similar in your waking life. If you don't any such person, it could be a spiritual friend or guide.
Doesn't this reflect exactly what was going on in your waking life? Wow, what a dream.