I'm soooo WORRIED! what the hell is happening?

Je
I got out of bed to go use the bathroom and my hair tie was off so I tried putting it back on. Upon putting it on, I felt my scalp so sore. My scalp hurts! As if I fell from a flight of stairs; it feels bruised! And when I touch the left side of my scalp, I'm noticing that I'm getting bald on that side. The other side has more hair. Before my pregnancy, I've always had hair loss but not this much! Not to the point that my hair feels & looks so thin, my scalp is sore & I'm going bald! I'm so worried right now. I'm freaking out. It's 3:47am and I'm losing my mind. 
Can it be the pregnancy (maybe the prenatals? Idk) or maybe the change in environment for me? I'm from the Caribbean so it's hot over there and came to Illinois and it's freezing over here. Also, I don't have my mom w me or much family members so I've been feeling sad & homesick lately.  
HORMONES or SOMETHING WORTH FREAKING OUT ABOUT? Help! I want to cry. 😔😞😟😢😢😢