Congratulations on your pregnancy 
No of course you aren't a freak! Even when you have planned a pregnancy, believe me, early pregnancy often leaves you feeling very detached, and very anxious. Hormones are wild and it still doesnt feel real. Personally I also resisted feeling anything much until I got past 20 weeks, I was terrified of wanting the baby too much. The scans were no help, I couldn't relate that fuzzy black and white blob to the idea of an actual human growing inside me. When the baby moved I was even more freaked out to be honest, it was only with my second child I actually enjoyed feeling the baby move.
And every mum-to-be worries that their quality of life will suffer. And it will! You will feel poorer, tired, your body changes shape, you lose your sense of being completely free, etc. But motherhood is also amazing, it is breathtakingly amazing. So it's a trade-off really.
I found it very reassuring to join a mums-to-be forum online as there will be loads of mums due to give birth same time as you with similar worries (and new ones you never even dreamed of) and they can offer lots of advice too. Also those cute little emails telling you about the development of your baby, and go shopping for a few things - I was in TK Maxx last week and the baby clothes were so cute (although i thoroughly recommend eBay used clothes, fabulous bargains as baby stuff especially newborn is barely used).
Also connect with the excited family members more often, get some positive vibes in your life.
Now alongside this you have a wobbly partner. That definitely does not help.
Do you live with your partner and why exactly did he freak out? I mean, an unplanned pregnancy can be quite a shock so there's that. Maybe it never struck him that birth control can fail. Maybe he didn't think of you as a forever-partner, and so he needed to get some space to reconcile himself with the idea you are now connected, forever. Or maybe the idea of having a child just wasnt on his radar and that alone sent him spinning. If you live together, not speaking to you for a week is pretty hostile, but if you don't live together I would view that week as his time to adjust to a HUGE piece of news. And I do think you need to forgive him either way.
It is very, very, very common for men to not appear even vaguely interested in their partner's pregnancy. The baby isn't real to them yet. My DH was hopeless while i was pregnant, did very few of the nice things you expect, like feeling the bump kick or offering to massage my feet, or even asking how I felt. But he has been an absolutely fantastic dad from the moment the baby arrived. So don't draw conclusions about whether your partner genuinely changed his mind and is now ok, it might be hard for him to be really excited or even really comprehend he is going to be a dad. That will change when a small red screaming child, his child, is in his arms..
If you haven't already, explore with your partner some of the more practical plans. Is there space in your bedroom for a bedside crib? You can have the baby in your room for a year, easily. So you don't need to rush discussions about bigger housing. Will you get any maternity pay, and if so how much? How long can you afford to be on maternity leave? Is your flat on the ground floor, where will you keep a pram? Sometimes men find it easier to relate to the practical problems they can address, and that helps them feel involved.
Finally just watch out for pre natal depression, in case you really start to spiral down.