How to deal

My husband and I have been trying to conceive for about 3 months now. The first two periods I was all "you'll get 'em next time, champ!" to my ovaries but this current period that started today has just wrecked me. I don't know how to deal when AF comes to visit this time around. I know we haven't been trying very long and everyone just tells me to just enjoy having sex all the time... I'm so scared something is wrong with me. My brother and his wife have gotten accidentally pregnant twice now and I worry that I actually planned to have a baby and it won't happen. Any tips on getting over the disappointment of AF making her rude return?