I just donated plasma for the second time today. I feel great about my choice in doing so; however, I'm pretty sore in my mouth. Just two days ago was the first time I have ever done it. The very next morning, I woke up and my upper lip was swollen and my gums where really sore and red. I asked the nurse today when I donated the second time, and she said she has never know this to be a side effect. Today, just hours after my second donation, under my tounge is sore and my bottom lip hurts. Is this a side effect?