Pregnancy.....................…

i am 26 weeks pregnant, and in my private area i have a piece of skin going up seprating my privates i think it stops midway and this hole is much smaller than my main one, i have only recently noticed it and have had my scans so i know my uterus is not double has anyone heard of this? can i still have a normal childbirth delivery. should i tell my midwife? iam a bit embred but she will obviously notice when i go in labour