i'm glad i stumbled across this thread, i've been wondering the same thing about other pregnant young adults..
my story is; i was with my ex for 7 months, he's a lot older than me. i'm 18..almost 19 an he's 39. we were very serious, he spoke about marriage and getting engaged all the time, we even looked at rings together. we were protecting ourselves in the beginning and then stopped. he always told me that he'd love for me to get pregnant. he has a 6 yr old daughter and said that having a second child with me and marrying me would complete everything for him. i was suspected to possibly have fertility problems and he even said he would take me to a fertility specialist and had me call to book an appointment. surprisingly, i got pregnant almost right after. we got in a huge fight right before i missed my period, and i took a test while we were on a break and when we got back together i told him i was pregnant. and when i did, suddenly out of nowhere he told me that he never wanted a child with me, that if i kept the child i would ruin his life, that he wasn't ready for a second child. just the complete opposite of all the things he told me. he told me ateast a hundred times he wanted me to get pregnant, and not meaning in the future. as in he would love a child as soon as possible. and in the end he flaked out. i've come to the conclusion it was all talk to get me going, lies to draw me closer and get me more attached to him. he admits he never thought i'd get pregnant and that he figured if i did he'd be able to talk me into an abortion.
funny how things turn out..so i honestly consider my pregnancy planned. but he claims otherwise.