Babies receive less than 1% of what medication etc that we consume. Most rules, I feel, are overkill in the interest of legal protection.

@sarahsmurfette@xanga - In most circumstances not taking pain meds is best...that's all this person was trying to say, sheesh.

No drug use, period. 

http://www.ncbi.nlm.nih.gov/pubmed/21338428

As well as some research on eczema and reproductive health exists. 

Stick to rest, food and hydration.  The heartburn could be due to GERD, so some changes in your lifestyle or what you eat would help.  Don't eat before you sleep, incline the bed near the head (elevate it), sleep on your left side, eat smaller, but more, meals, etc.  Basically, the lower esophageal sphincter is more known as a physiological sphincter, not so much as an anatomical one.  I'll explain.  A sphincter is any round muscle, completely round, that acts as a gate, pyloric sphincter between the lower stomach and duodenum is an example, as well as your lips. They are very strong muscles that can close very tightly.  The esophageal sphincter tends to be very weak by nature, again thus why they don't like to think of it as a sphincter, and so if you just ate and produce acid, and you are held upside down, odds are the food will come back up, or in this case down, due to gravity. The pyloric sphincter is very strong, as well as the internal and external (the voluntary one) rectal sphincters.  This is why when upright, we never have issues with our food or fecal matter just "refluxing" down without our desire.  Changes like mentioned above will keep you in a more upright position, so food is kept down by gravity.  The left side is due to the fundus of the stomach being on that side, where on the right side, is the cardiac area and the, dum dum dum, lower esophageal sphincter.

For pain relief, again natural stuff.  There are some studies out there saying bad things, then some saying good things, but honestly, why risk it? Even if there is a .000001% that something bad will happen, why risk it?  I know not everyone can just sleep, but those that can, just do that or find ways to motivate you to sleep.  Mind over matter. 

For a cold, just deal with it.  The fever normally is reduced by some form of NSAID, like acetaminophen, but since we are going all osteopathic here, just rest, and get plenty of fluids.  Humidifiers work well, but avoid over humidifying, as mold growth can be just as bad, for you and your child. 

As for vitamins, there are both pre and post-natal vitamins. Ask your doctor.  For any vitamin usage you need to check with a doctor; pregnant or not.  Not everyone follows this though and it can be bad.  As an example,  B12 deficiency and folic acid (B9). Folic acid may mask B12 deficiencies and lead to belief that you are "better", but in reality it is not correcting the neurological impact a B12 deficiency has.  There are many other things that overtaking, undertaking, vitamins can cause, so it is best to check with an MD/DO.  I can't say a practice what I preach here, but if your pregnant or just had a child, you're seeing the doctor more often that I am, so on one of your visits, ask him/her. 

And vitamin A is dangerous at all times.  The amount needed a day is small, so having a healthy varied diet will normally suffice; unless you have impaired absorption or a zinc deficiency, again need for testing there.  The normal intake required and even the upper limit are smalls, and the chance for toxicity, intracranial pressure, and neurological damage is just unnecessary.