my parents are expecting, should i stop ttc?

should i stop TTC? me and my boyfriend have been trying for a few months, but no luck yet. i am 20 y/o, & currently am my fathers only child. i’m not saying anything bad about it, but his girlfriend just found out she was pregnant.. should i feel discouraged and stop trying because my dad is having a baby soon? i was so excited to finally have a baby of my own, but now i feel some sort of guilt? i don’t know how to explain it