I need HELP. Q

marisol • Im 30 yrs old with 11yr old daugther and 8 yr old son im ttc for my 3 child ❤
Oky ladys i need some help AF was do the 21 it didnt show till the 22snd my cycle is 5 days long but this cycle was 31/2 days im haveing lower back pain plus some cramping it feel like if af is gana show up again but notthing i have no discharge of any kind its kind tripping me out i been trying to ttc for 4month know