Respected Madam, hi I evaluated your query thoroughly.
Per se
blood donation is not going to make enlarged and swollen veins , only if puncture site was partially out that area can get some minor swelling /
redness / pain / itching.
Heaviness in chest on deep breath or cough is related to your
anxiety nothing else. White spot has also nothing to do with blood donation.
Relax, take care follow certain steps at home and you will be fine in 24 hours
*maintain your hydration level by taking plenty of liquids, lemon juice,
coconut water, tea, coffee etc.
*keep your BP and Blood sugar levels under control.
*avoid
stress / anxiety.
*have adequate sleep of 8 hours.
*take all normal diet as usual.
*avoid
smoking / alcohol consumption if at all doing.
*YOGA for 20 minutes daily would be of tremendous help.
Hope this clears your queries.
Thanks for using Health care Magic.
Regards
Wishing you fast and speedy recovery from the same.
Bye and keep donating blood in future also to save precious human lives on the earth by your blood without fearing like these minor issues Dear take care.