I am not gaining any muscles/muscles strength....what's wrong?

[godsamurai]

instead of adding 20pds on the bar, try to add 5pds.. you are expecting too much for novice trained for 3 months.

[BankWalker]

If you aren't gaining, you aren't eating enough.
If you aren't losing, you're eating too much.

This sums it up. Don't buy into the "clean" diet BS. When it comes to weight gain or loss, a calorie is a calorie. OP, increase your calories to 3000 per day, every day for a month and report back.