Everyone is different and some people breeze through pregnancy enjoying every moment, whilst others have such a tough time from start to finish. Most people however are somewhere in the middle and usually the worst is over by the start of the second trimester.
I felt exactly like you in my first pregnancy. I was shocked at the impact it had on my life as I was used to being super productive, working really hard at work, cooking, keeping our house looking lovely, exercising loads etc but I just felt like I had the hangover from hell every day!
I'm pregnant with my second now, and finding it much easier - mostly because feeling terrible was not so much of a shock this time - I was prepared for it and I also knew that it wouldn't last forever and how special it is to be a mum and have a baby.
Drinking loads of fluid helps - as if I am remotely dehydrated the nausea is much worse. I force myself to drink two pints of fluid when I first wake and drink as much as I can through the day. I also make sure I eat regularly and don't worry what I'm eating - just feel happy that I've eaten something.
I have not even tried to exercise this time, as I realise it will only make me feel worse, and I can work on fitness when I start feeling better again.
I literally go to work, come home, do my toddlers bedtime and then get ready for bed myself. I've accepted life is going to be a bit dull until I start feeling better and I have not made any evening social plans for a while. It is boring, but it means I feel so much better than I would if I was trying to do everything I usually would. My partner does all of the cooking and cleaning at the moment - luckily he is very understanding. He knows I'm not lazy, I am just struggling. I don't feel guilty as he is lucky he is not having to feel this crappy and still gets a baby at the end of it!
Last pregnancy, I really enjoyed life again as the pregnancy went on, it actually got easier and easier up until the last month or so when I felt tired again. After the sickness had passed, I started running again and actually ran regularly up until 24 weeks.
I also told my close friends, closest work colleagues and close family very early on this time - largely because there was no way I could hide not drinking over Christmas, but also I figured worst case scenario and the first scan picks up a major problem, most of these people would guess something was up and I'd probably end up telling them anyway. Life is so much easier when others around you know how you're feeling.
I hope you feel better soon.