The doctor at the donation center said I had to wait 6 weeks before I could dontate plasma again. I waited 6 weeks and have been going twice a week since then. I have been having a problem with my feet swelling and my PCP and surgeon couldn't figure it out until I mentioned donating plasma. They said "that's it!". They said donating plasma was pulling protein (especially a certain component of the protein) off and I haven't been able to replenish with just what I am eating. I had to give it up which is hard because the extra $$ was great! I just stopped donating Thursday night so I will probably know more in about a week if the swelling is going to subside. Even while pregnant or at my heaviest weight I have never had a problem with feet swelling, this was mind boggling!