Hi, I Have A Problem That's Been Bothering Me For

Hi, I have a problem that's been bothering me for a long time. I am brown skinned and my neck is black. It is a lot darker then my face and chest, it looks awful and makes me feel uncomfortable at times. My armpits also are very dark, so I try to avoid wearing anything that puts them on display. My back is very very dark in comparison to the rest of my body, I have light brown patches everywhere on my back that seem like they have showed up from nowhere! so I also try to avoid wearing anything that will show my shoulders or back. I'm late into my pregnancy at the moment also and I think since I've become pregnant, the darker areas have become darker. Please could you offer some help! Im have really been considering using bleaching creams but I know that will damage my skin even more. I don't know what else I can do. I feel so self conscious because of my skin. Thank you, Tabitha