Trying to conceive

DARILYN
Hey everyone i been trying for 7 almost 8 months and I'm still NOT pregnant...
I take prenatal vitamins everyday...
I did have a irregular period before I was trying and it got back to regular... 
I really don't know what to do anymore..
I'm always depress and it hurts every time... 
So it's stresses me out... 
I don't know what to do anymore
Anyone that had this problem???