Stressed out!!

Nikki
Me and my so have been trying to get preganant for a long time I've had 2 miscarriages and for the last 6 months I've been really trying. Watching what I eat and drink , loosing a couple pounds, excersiseing and drinking more water. I'm constantly on this app u dating stuff and keeping up with my days . I have 2 beautiful girl from a previous marriage and he has 2 kids from a previous marriage so we both now we're capable of having children , I just don't understand why I'm having such a hard time.