Feeling lonely?

Does anyone else feel really lonely at times during their pregnancy, in-spite of not being alone? I have a wonderful and supportive spouse, friends and family (who I’m not emotionally close with, but they are there to help and check up on me). At times though I still feel as though I have no one to talk to regarding pregnancy related frustrations or why I’m feeling low for no reason. My husband tries to get me to cheer up and asks how he can help but the thing is, I don’t know the answer myself. It’s like being in the dark and hitting walls all the time.