Never donate before I felt like I don't have extra blood to be donated
Regular exercise cuz I like badminton only haha do why just fall in love with

I don't smoke/vape/drink. Imma type of guy that hit the club with orange juice

If I got chance to donate I will

To donate blood, minimum weight is 45kg, good health, enough sleep and other requirements.

If you have discomfort then see doctor at the same time ask about worms inside digestive system.
After doctor diagnose, if necessary there are de-worming prescription you can take.

Also person in good health with good lifestyle and eating would not gaining excessive weight either. Maybe you are normal.