Welcome to the club
Hi UTURN,
As a fellow hard gainer, I can share what works for me.
1. Be grateful. If you were planning to be 300+ pounds of muscle, let that dream go, or start buying steriods in bulk. But otherwise, if you have a high metabolism and a lean body type then all-in-all I consider that a blessing. You get to eat lots of food, you get the health benefits of low body fat, the muscle you do gain will show, and chicks dig six-packs.
2. Be patient. 14 lbs in two months is a lot!
2.5 Avoid future injury. Consistency is far more important than quick gains. Development of bone density and tendon/ligament strength trail muscular development by several months. So even though you may have shot up 50lbs on your bench over a couple months, your elbow and shoulder joints need a little time to catch up.
3. Eat more. As funk said, you should eat more protein. But depening on your weight, 3000 cals may still not be enough.
4. Don't overtrain. I used to train each bodypart twice a week on a three day split. So six days a week in the gym, one day off. I cut that in half - 3 days a week, still a three day split - and my strength shot up. Recovering fully also means plenty of sleep.
5. Lift Heavy. Yes, following this rule can bring you close to breaking number 2. But 2 has to come first. Heavy means heavy for you, not anyone else. If you can't use good form, the weight is too heavy. If you have to "cheat" on the last rep or two, that is fine - but it is still better to get a spotter and go to absolute failure with good form and the help of a spotter. Heavy also means heavy for your weakest bodypart. So if your pecs can handle 225 on bench but your shoulder starts aching at 195. Stick with 190 until your shoulder catches up.
Take care of the shoulder and best of luck!
-W