I had IVF twins then another natural miracle 14 months later so I kind of beat you op in the stress stakes if it's a competition.
Believe me having a close age gap was absolutely nothing into comparison to having twins,it didn't even come close.The age gap thing actually was a breeze in comparison so sorry to burst your bubble.
My sister and my best friend had twins too so I could see both options.
Twins are a freak of nature,you're not designed to have them. Women have been having babies with close gaps for years,in some cultures women can have a baby a year.
With twins they both need you at exactly the same stage of development all the time.When dd was a baby you barely noticed she was there.She slept in her basket behind her Baby Dan cage,went in the sling.I only had one baby to feed so got loads of cuddles and could take my time with feeds instead of frantically juggling. Newborn colic in stereo aint a picnic.Twins wake each other up continuously so you literally spend the first few months functioning on practically zero sleep.By the time dd was born an earthquake wouldn't have woken the dtwins. Putting 2 newborns back into a buggy out and about is a nightmare ditto strapping them into cars.When they start walking one just legs it.The 15 month age gap meant they learnt a lot more safety issues by the time I went through it again with dd the following year.2 toddlers the same age is a freakin nightmare.By the time dd was old enough to run for it the twins had grown out of that stage.I could go on and on........
With a close gap the whole point is there is a gap and the older child has learnt a lot.
Don't get me started on the money.You need a fuck off expensive double buggy(cheap ones make your life hell if you have a double).With one you can get away with a single half the price and a buggy board.My dtwins went on a board at 14/15 months.You have to buy 2 times moses baskets,2 times cots,2 times bedding,2 times clothes,2 times bottles,2 times mattresses,2 times newborn car seat etc...... I didn't have to buy a thing for dd.
Re the IVF I had 3 embryos implanted as I was told I had zero chance of any of them taking.We had to use them up in readiness for adoption.My sisters were a complete fluke (ditto my friend) and she was devastated after seeing how hard twins were for me.
I've met a lot of twins mums and not met one who hasn't struggled or moaned.We all get on with it because we know we're blessed and you have little choice but to get on with it.I've met a lot of mums with close ages and none have found it as hard as you seem to be finding it op,I'm not being nasty just wondering if you need support.