Hair fall during pregnancy?

So since the sencond trimester has started, I have noticed my hair falling out at a much higher rate than normal for me. Where it is supposed to be thick and lustrous, it is brittle and comes out in large gobs now. I have made my diet as healthy as possible. I do a coconut oil treatment in it almost weekly now and take my prenatals like I'm supposed to. Has anyone else experienced this before birth? Is this something I should be concerned with? #firsttimemomproblems