Totally normal. My aunt and I were pregnant at the same time. I was aix weeks steady with SO, she was married and TTC after a missed miscarriage. She really was happy for me. Just remember it's posaible to be happy for someone else and sad for yourself too.
I've been in a similar situation (but we were actually trying) and it's hard when you have friends who are also trying to get pregnant and it just isn't happening for them. Sadly, the couple stopped being friends with us because of it. I felt guilty for a while, but eventually they had their baby and still do this day won't speak to us.
My BIL and his wife have been trying and just found out that they probably wont be able to have kids. I feel really guilty and so horrible that we got pregnant on accident. I honestly think that they didn't come over to MIL's on Thanksgiving because of me.