Bless you op, Sorry you feel like this and I can sympathise. Yes it is quite normal to have low points, especially in the 1st trimester.
Weeks 6-8 were my worst, I felt the same - sick, exhausted, went off most food, was teary, generally low and questioned what the hell I had done to myself.
It will pass. I’m 14 weeks now and I feel I am past the worst of it, although I still get occasional light sickness and I get tired quicker than I normally would but it isn’t anywhere near as bad. My sickness is mostly triggered by how tired I am so it creeps up on me when I start to overdo anything.
My SIL suggested I try Spatone liquid iron supplements that I can have in orange juice, I started having that since the end of week 8 and I do feel that really took the edge off for the last few weeks of my 1st trimester.
Until your 1st trimester is over, be kind to yourself. Sleep as much as you want, don’t push yourself. You may feel lazy and frustrated but the moment I just accepted that my body is using all my energy to create a baby and that I just wasn’t able to function the way I normally would, made life a little bit easier.
If you haven’t tried it already - personally ice lollies are my saviour for easing the nausea! I think just sucking on an ice cube does the trick as well. Try and eat what you can (hunger is another thing that sets sickness off). I lived on satsumas, marmite on toast and bbq crisps for a while because that was all I could stomach.
If you really feel you are going into a dark place, speak with your midwife.
Good luck and I really hope you start to perk up soon!