Got Beat Up by the Big Boys

So the day after I finished my project I was so excited to keep playing. I went to Jamba Juice in the morning while my GF had class and logged in to a good 2 hour session 3 tabling .50/1 NL 6max tables. I won a little over 200 bucks in 2 hours thats like 100 dollars per hour!
Unfortunately I lost it all back later in the day when I was at home... I was browsing the 1/2 NL 6 max tables and saw one with a bunch of lower stacks. I cashed in 200 and after a few encounters with a player who i had a read on as a loose caller, the following hand happened. I had KK from dealer position raise only to 6 dollars 3x the blinds... I wanted action. The SB which was the loose player and BB called . Flop comes JQ7. The SB opened with a standard bet of 8 dollars and BB called. I raised to about 48, SB goes all in, BB calls... and I... CALLED for about 100 more. Turn and River are 6 and 5 or something like that. Loose player flips over JQ and BB mucks and I mucked my KK. Certainly was a questionable called but both these players were so loose it was hard for me to lay down my overpair against them.
I did not feel nearly as bad losing that 200 dollar however for some reason, I guess it is because I had won earlier that day. This in a way made me feel good about my game as I know I can play with a deep enough stack and BR to not be scared of losing money anymore.
Its also good to know that at one point I can be playign at this blind limit. My goal is to start playing at this limit when i hit around 7k BR. For now I will grind it up in the .50/1 dollar tables.