last pg, zofran didnt do anything, the only thing i found worked was natropathic drops called nux vomica (only stopped the vomiting but not most of the nausea). this time around zofran has helped, i started off taking 4mg morning and night so total of 8mg per day. it worked for the most part but sometimes only stopped me vomiting but not actually feeling sick. i am still taking zofran most mornings this pg.
it sounds like you are getting silent migraines in the arvo. i get them and that pretty much describes them perfectly. im not sure if that is a side effect of the zofran or maybe from getting dehydrated (what often causes mine)? i would call your HCP and check in case it is the zofran doing this.
as for the constipation i took double the recomended daily amount for a few of days at first to get things moving (which took a few days) then just kept taking normal amount every morning to keep everything moving.

HTH