No appetite ... I want to gain weight

Ladies please help me 😞 I literally have no appetite.. like all day sometimes! I’m 5 months pp n I started losing my appetite a month ago I think. About 2 weeks ago, Someone I knew passed away and I lost 10 lbs in just a few days!!!😫 I’m already tiny as it is. I’ve always had trouble gaining weight and I probably weigh 100 or maybe under now 😓 I really wanted to keep my weight that I gained with my son but ughh it’s gone 😞 it’s so hard for me to gain weight. & lately I have not had an appetite. I literally can only take 1 or 2 bites of my food. In the mornings I gag soo much, I can’t even eat😓 one time I tried thc drops (I think that’s what their called) and it did help me! But I have none. So is there anything else that can help me have an appetite??? I hate my body man I look like a little ass girl. Married with 2 babies, I’ll be 24 this year. Please someone help ya girl out 😞😞😞 I just wanna feel good about myself again. I hate feeling this low. Edit: I’ve never had a thyroid problem before but I should probably get checked again!