Fatigue, Weakness & Bruising After Pregnancy & Nutritional Deficiencies

Question
Hello,I am 41 years old. In the past after a pregnancy and nursing for over 1 year I have been diagnosed with some nutritional deficiencies. I am at the end of another pregnancy nursing cycle and have been very tired, weak and run down. I am over weight by 50 lbs with a great desire to lose the lbs and a new start weekly only to fail. I have been receiving B-12 injection weekly The first three weeks I did not bruise but now I bruise at the injection site and the bruise remains for at least two weeks. Would the B-12 injections cause one to bruise easily? I am scheduled for a blood work up July 31 but was hoping you could suggest something. I ordinarily have no allergies but when my body is run down I am more sensitive. I have tried to maintain vitamins and green powder throughout this pregnancy and 17 month nursing but I am still losing ground. Yesterday I was stung by a bee and the entire left foot swelled and itched 24 hours later it is still extrememly swolen my left lymph node is also swollen and sore. I have never had such a reaction to a bee sting. Is this  aresult of my bodys immune system being weak?

Answer
Hi Cara,
Sorry for the delay. My regular practice has been unbelievably busy.
It sounds like you are undergoing so some significant changes in your body. I would suggest a thyroid function, diabetes testing and a blood count. Unfortunately some women have major changes from pregnancy and some diseases are kicked off by the pregnancy itself. It is very important to have an evaluation.