TTC going on 4 months..

Kayla • TTC ! Praying to have our Little Lynch
Me and my SO have been trying for 4 months now to get pregnant. I track my period and ovulation days. Today I'm actually going to buy the clearblue ovulation kit (has anyone had an experience with it? What's your review?) I check my CM and we have sex when its egg white and stretchy. Still no positive test yet. We are both in our 20's and although we're not examples of healthy eaters. Neither of us is extremely heavy. Starting to feel disappointed and heart broken. Any tips ?