Hi.
So sorry you're in such s state about it.
It sounds to me like you've made your mind up what you want to do and are talking yourself into it more by worrying about the ibuprofen/drinking/no folic acid thing.
You shouldn't worry about them as lots of people don't find out they're pregnant till later and have had far too much to drink.
My DD was unplanned and I was single!!! I was worried as had been on some serious benders...Doctor assured me that if it was that easy to get rid of/damage a baby then abortion wouldn't need to exist.
I can see why you are not happy about it and how it would impact your relationship with each other and your 9 mth old is a real concern.
I do think though that you could seriously regret a quick decision.
To play devils advocate, would it be that much harder to have another one really?? You must still have a lot of baby stuff and they would be very close in age and could share a room etc.
It is your decision of course and I am in no way judging you.
I was booked to have a termination when I found out I was PG as I was single, lived in a shared house with my mates, had NO savings and was in £10k worth of debt!
In the end I couldn't so it and for me it was the best thing I've ever done and I am now happily expecting my second baby ( all planned ) I never actually struggled either and all the things I thought would be impossible weren't.
It's a very personal decision, hope you're okay, take some time to think things through xx