Dear A.,
First of all Congratulations!
Yes, you are pregnant, but there are some things you can do. The test for thyroid that has been suggested is a possibility. Low thyroid in pregnancy can cause serious problems for the fetus- it also could cause all sorts of problems for you. But more commonly, besides fatigue due to being on overload, look at your DIET! Are you really nourishing yourself and baby? Are you intaking caffeine, as has also been mentioned? It can cause a real drain as can chocolate and sugar! Are you taking really good prenatal vitamins? I really think that the Dr.s are trying when they give women the prescription variety, but they pale in comparison to the natural vitamins you can get at the Health Food store for Pregnancy. The down side is you usually have to take 3-6/day depending on the recommendation, but it's totally worth it. My ninth pregnancy was wonderful largely in part to the great prenatal Vits. that I found- and I had a very healthy baby born at home @ almost 43 and felt great too!
Also Kelp is a good balancer. It, by itself has a very good range of vitamins and minerals. But first and foremost, I found that Nutritional yeast- it is Brewer's yeast with Folic acid added- a couple of tablespoons in some orange juice was the best for mood swings and being "upset" and crying a lot.
Do Not diet- eat really well- leave the sugar and refined foods for a once in a while treat, eat your broccoli, dark green lettuce, good veggies, fruit, whole grains and of course red meat if your not a vegetarian. Dairy is great too as a protein- which is very good to keep your protein up, remember though that dairy doesn't have iron to help build your blood. That's where good prenatals will help too.
Walk walk walk ! Go alone sometimes, but bring the kids- put them both in a stroller, or have the three year old ride her trike...fresh air, green trees, blue sky!(I hear it's almost spring but we are expecting snow again!)You could even bring hubby!
You can improve your emotional and physical stability. Realize you need to give yourself some space and appreciate that you are really doing a lot of hard work! Let go some of the things that you are doing that are not essential. Keep the house as clean as you can, but don't get obsessed with order. Being a mom is the greatest and the most challenging thing you will ever do! It is also, by far the most rewarding.
Do what you have control over- those things mentioned above and monitor yourself to see how you are improving. If you still are struggling, then see your (I prefer Midwife) health care professional to get some answers, maybe they feel you need some labs drawn etc.
Remember yourself in your prayers as well! You need those blessings for you, your family and your new little one.
Take Care and God Bless,
H. B. mom (mother of many-9)