Itchy spots on body

I'm 14 weeks now and I had developed alot of - not so sure what to call it, spots? hives? rashes? - developing on my body, esp my upper thighs, back, chest, and both my arms. It was really itchy when it developed like 2-3 weeks ago. Although its less itchy now, there are lots of it still on my body. Should I be worried? Any of you faced/are facing this? What did you do about it?