Pregnancy and Hair thickness

So I havent notice my hair growing or getting longer until recently.  In fact not even longer but more so thicker. Its beautiful and lovely and I get compliments that the pregnancy is doing me well but I am afraid that its all going to fall out when I give birth... check out this excerpt from the baby center website

http://www.babycenter.com/0_hair-and-nail-changes-during-pregnancy_1456563.bc

Is it common for your hair to get thicker when you're pregnant?

You may find that your hair feels fuller when you're pregnant. But you're not actually growing more hair (and the strands themselves aren't any thicker) – you're just losing it more slowly than you usually do.
Here's what's going on: Normally, 85 to 95 percent of the hair on your head is growing and the other 5 to 15 percent is in a resting stage. After the resting period, this hair naturally falls out (often while you're brushing or shampooing your hair) and is replaced by new growth. The average woman sheds about 100 hairs a day.
During pregnancy, higher levels of estrogen prolong the growth phase, resulting in less shedding of hair and thicker tresses. Some women also notice that their hair becomes shinier during pregnancy or that it changes in texture (curly hair might become straighter, for example).
Your postpartum locks probably won't be as luxurious. After giving birth, the growth/rest cycle goes back to its previous pattern, so you may notice more hair falling on out.
Not all pregnant women notice dramatic changes in their hair before and after giving birth, though. Among those who do, the changes tend to be more obvious in women with longer hair.