Feeling Down

I am 8 weeks 4 days pregnant. I have had EVERY symptom in the book - extreme nausea and vomiting (diagnosed with HG), extremely sore boobs, hot flashes with chills, fatigue, constipation, etc. I am BLESSED to be carrying my child, but it is very hard to get excited when I feel miserable all the time. I can't even bring myself to get out of the house, because I feel so awful. Thankfully, I am a teacher with the summer off, but is it going to get better? I just want to be excited and back to my OLD self again, I'm very active so being a couch potato is quite depressing :( 
My questions are: does it get better? and how do you endure it until it does?