im 22, 21 when i told my dad. i was sh*tting myself over telling him as im the only daughter and its not like me and OH was settled, i was still living at home, just started a new job, OH is paying off debts, id just been accepted for university.... it wasnt perfect timing to say the least. i knew it OH knew it and i knew my dad wouldnt disown me or anything i just really couldnt be bothered with being told what i already know.
so i told him a week after i found out and he harped on mentioning every single thing we was giving up, every problem in our way etc... but i simply told him i was aware of everything he said and under no circumstances was i going to consider having a termination (i personally couldnt have 1) and he'll have to get used to the idea of being a grandad or carry on being negative and risk me not sharing anything with him regarding the pregnancy or the baby when it arrives, needless to say that was the kick up the arse he needed.
nowdays he's so excited.
i think no matter what your situation is you parent/s always mark out the negatives and point out the obvious especially if your not married, living together etc etc... if your parent is negative towards you being pregnant dont take it to heart they come round and if they dont you just go out your way to prove them wrong.
good luck hun xxx