Hi there.
reading your post is like listening to a post i myself would write. im 48 now and i started out with those exact symptoms at 42. literally overnight. nausea, light headed but no spinning - like i was motion sick. unfortunately for me i am still suffering. it has been a long road for me. :'(visited every consultant i could think of - 3 ENT specialists, 2 neurologists, 2 cardiologists. had MRI, bloods etc.
my own doctor is compleltely uncaring and even suggested i could be depressed. that suggestion alone was so disheartenning. in ireland where i live, its very hard to change doctor as they are all full to capacity. my periods have changed in the last few years to shorter cycles but i havent missed one. i wish they would just go away.
i too have low iron and i am working on that but what i think is important is if you get your ferritin checked which is your iron stores and with all bloods ALWAYS ask for a printout of the levels as they can tell you they are normal when in fact they are at the lower end of normal. B12 is very important too.
i think the lowering of oestrogen affects our blood vessels and causes that light headed feeling. i had my period on thursday last and all saturday i was sooo dizzy and felt sick with it.. just from walking around. i was told by a nutritionist that there are oestrogen receptors all over our bodies, including the brain so im holding onto that.
i too am working from home and juggling kids, house, job etc and finding it very stressful too.
i wish i could offer you some suggestions, but i cant as i cant even help myself. just make sure you are taking good supplements and eating well.. the usual lifestyle stuff. unfortunately, blood tests dont show perimenopause changes as the hormones fluctuate too much.
keep in touch x