Ugh!!!! Don't know what to do!

Cheyenne • I an 27 and I have a 3 year old boy, 6 year old boy, a 7 year old little girl, and 16 month old little girl
So my SO and I are trying for #2 and I am soooo confused and frustrated!! We have been trying for about 2 months and for the past week I have been having major pregnancy symptoms and two days ago I got a faint positive... But I took an ept today and it was negative! And I haven't gotten my period back since #1 so I have nothing to go off of :(