Two Weeks of SS. Made gains in both lifts and weight, but...

Just finished my second week of SS. My squat has gone from 75 to 105 already. My bench went from 65 to 85. It's still pretty sad, I know, but I feel good about my progress.

I've also gained 5 pounds putting me at just over 150. I would consider this good, but I think most of it has gone to my midsection. I was pretty skinny everywhere before except for a fair sized pot belly and a hint of love handles. Now the pot belly seems to have grown. Should I be worried about this or should I stay the course and keep eating to gain?