Should I expect to plateau shortly?

[slim]

I've been working out 5 times a week (weight training) for about 8 weeks now. I started the protein drinks about 5 weeks ago. In total I have put on about 17-20 pounds. I am pretty happy with my results. I want to put on another 15 pounds. If I keep eating the same amount and same protein and same workout....can i expect to put on 15 more pounds in the next 2-4 months.

Backgorund info: Im 6 ft tall and my normal weight for the last 10 yrs is only about 155 to 160...thats with no working out at all and regualr not great diet. My diet now is a little better but not like crazy amounts of calories. I have no idea on the caolories. Right now Im at 175 llbs. I want to be 190.