Weight & sex!!!

Is it normal for a pregnant woman to lose weight instead of gain during the first trimester? Because I've been Losing weight. My appetite changed drastically. I can't eat meat first of all and every time I take a bite out of anything it grosses me out right away and can not eat anymore. 😩 and I love food!!! And sex but I have no appetite and I don't even want to have sex with my man😩😭😭😭 hope this changes soon. I would love to eat & please my other half. 😓