IP you must see "Wedding Crashers" ... do it for Bunny .... it's hilarious
As far as the carb issue, I think it's the case with ANY low carb diet... the 1st week or so you're going to see a huge drop b/c the low carbs... that's why people are like "Wow in 2 weeks I lost 20 lbs on the {insert low carb diet of choice} ..." even though those drops can be seen in the 1st week as well (i.e. 20 lbs in 7 days ... woo hoo). It's water people!!! Anyway ...
What I can relate this to before I can get Sassy of DG to jump in here...
I did a carb up last year ... and took pics ... IMPE, I was flat ... REALLY depleted, then I carbed up & blew up ... OMG it was over the course of about 4-5 days, Flat... little less flat, Bloated, PREGO, full muscles... I took a pic with my hands on my belly b/c I looked pregnant and I thought it was hilarious ... after that day, next morning, and the following one for that matter, my muscles filled out really nicely and I looked fuller ... I dare NOT step on the scale b/c I think at that time I was still hung up on those #'s and that would NOT have been good when testing out a carb up ...
I know this won't offend you, but when you low carb and look for sources, Broc is a good one, and guess what Broc is known to do... other than make you feel all full of air, bloated, gassy even ... Have you been eating a lot or Broccoli or SOMETHING that is making you react this way? For some time I would feel all bloated b/c my stomach was having some ype of reaction to the oats I was eating, but they were too good to give up, so I just rolled with it, and new if I have Oats, then well, My stomach was going to 'expland' for a few days ... some little irritation going on inside... but these are things you pick up over time as you experiment get to know your body...
You must experience them & go thru them to find out what will happen in your particular situation ...
Again with that said, I hope it's nothing serious and you should probably start taking some Beano or another digestive type enzyme to see if that helps ... Gassy or bloated or not, Beano IS a dig. enz and helps alot of people.