Feeling broken and usless !

What the f.... I've had a hsg test in May showed tubes were clear then was put on 2.5mg of Letrozole for 3months this was the 3rd month guess what ....bfn I thought that a level of 39.5 for progesterone to show that uve ovulated was Gd ? Been ttc now for 14 months ever one else around me is getting preg or saying were pregnant I'm happy for them but dying inside I have a six year old daughter-with with my ex I was 22 when I found out I was preg with her I'm now 28 what's going on please girls can u give any advice ?