Feverish baby!!! (Warning content being TMI!)

My baby is 7 months old. He has a fever for about 4 days now and it’s goes on and off getting better, he’ll play laugh and often will not even look that bad but then randomly it’ll get worse. He will feel super warm and cough a lot and boogers. He sometimes eats. But quickly after he doesn’t want to eat or drink. He’s also been vomiting and diarrhea even. I have been giving him some medicine every 4 hours along with the tiny cold tablets, thyme and clove

Tea, nebulizer, warm baths with essential oils, breastmilk, and chicken broth soup. Even with all these things he still hasn’t gotten better . He looks miserable. I’m worried to death but some people say to just wait it out because this “common cold” is going around and it a rough one this time but others just say go to the doctor. Im limited on what I give him since he’s so tiny but I’m scared he’s getting worse.. I also don’t know what the doctors would do that I’m not already doing. Any advice on if I should go or not and what I haven’t tried?