Any advice/ experience welcome 🆘

My son has been super tricky recently. Last week he was refusing food and we went days with barely eating anything. I could hear his stomach rumbling and his mood was terrible, crying, clingy and just really irritable. I was practically throwing food at him and praying he would eat. 🙏🏻 I initially thought he was sick or teething or there was reason but now I’m beginning to suspect it’s a bit controlled and I have a hunger striker on my hands 😅 We have made improvements but food is still so tricky. Not eating anywhere near enough but eating some. Breakfast seems to go down ok but lunch and dinner is mostly a miss. Takes so much effort and distraction to get him to eat. I’ve tried switching up his plates he uses so it’s interesting and I even got him a new table and chairs so he could eat outside for a change of scenery but my goodness I’m feeling a bit stressed with the lack of food. He must be losing weight. Any advice or experience is welcome. 😊