first month ttc and feeling disappointed

After waiting for a while we finally started ttc last cycle and today I got my period :( I don't drink or smoke and was very conscious about my fertile days. At some point I was 80% certain I was gonna be pregnant, especially since both my best friends got pregnant the first try....I feel so disappointed and frustrated and sad. I know it's not easy and taking some time for even the healthiest of couples but it's still a very emotional rollercoaster. I feel like I don't wanna be around my best friend who is 4 months pregnant and has the cutest baby bump ever, all I wanna do is not think about babies and pregnancies...:/ how do I stop my mind from going crazy? I feel like every month it's not gonna happen will only make it worse....sorry for the rant, just had to let it out somewhere ;)