Why do I look like I'm not gaining muscle?

Anonymous
So back in the middle of janurary to beginning of februrary I bought a pull up bar for my room door. I could only do 3-4 chin ups (so maybe 1 pullup) Well fastforward to now. I can do 14 chin ups and about 10 pull ups yet my muscles are no bigger or toned than they were back in janurary. I talked to a guy at a gym he said I just need to eat more protein. Well I have eggs every morning about 3 greek yougurts in a day and plenty of turkey lunch meat. Yet I am not gaining any mass. What is happening because I'm clearly 3-4x stronger than I was a few months ago. I am doing it for the strength and not just the way I look but there is something clearly wrong here.
Why do I look like I'm not gaining muscle?
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