It’s been 4 months and I haven’t seen the slightest change of my hair transplant. I’m very upset. Will it get better?

I need further information about the photos. Are the photos at the 4 month mark, or are any of them pre-op? I can see the immediate post-op photo, but to give any judgement or advice I need to compare a pre-op and post-op at 4 months photo.

It's difficult to give an opinion as I don't see the pre-op photo. Also, it's too early to be upset as it's just 4 months post-op. Normally you'll see significant change after 6 months. 

First regrowth should be observed on 3-3.5 months after surgery. Regrowing hair is thin, undersized and not bright untill 4-5 th months of hair transplant. İt's normal for new growing hair starting to get native characteristics, waviness, curl in first 6-7 months..This actually takes 10-13 months for hair to become full mature , as thick and bright  as native hair. 

You must be patient. It sometimes takes 6-8 months before you see noticeable growth. Then it will come in rapidly once it begins.  

It's more the rule than the exception to have very little visible growth; it takes 8-12 months to see your final results.  The way you worded your question is curious, however- if you did something the first several days after surgery against your surgeon's advice, there may problems.  Give it at least another four months, then go see you surgeon to review photos and discuss results.