I'm working on gaining weight, have I gained WAY too much too fast?!

I'm working on gaining weight, have I gained WAY too much too fast?

A bodybuilder I know who's helping me w/ gaining weight even said he's never heard anyone gain as much weight as I just have this fast. A little less than 2 weeks ago I was 110 lbs. at 5'6" (male) and now w/ lots of protein, the right food (not crap food), and lifting more I'm up to 130 lbs. I needed to do this, since as a XC runner I've been really sick due to my lack of weight. My question is, is gaining this much weight at once bad for me? Should I IMMEDIATELY stop what I'm doing? TIA

1 week ago
I actually feel much better running now, and in fact a lot stronger, but it still feels like too much too fast...

1 week ago
ha fancydoll.... not complaining just wondering if this is more of a bad thing than a good thing. just want to make sure i am ok

its good to gain it in a slow and gradual change, because if you gain it too fast your body will take time getting used to the new changes! like for ex: you might not be able to run fast becuase your legs are still used to the old skinny you!