Haven't Lost Baby Weight, Ok to Try Again?

I had my son a year ago. I was 164 lbs when I got pregnant with him and a year later I weigh 190. I am 5 feet, 4 inches tall. We breastfeed exclusively (still) but I have not lost any weight since coming home from the hospital with him. My husband and I would like to go ahead an attempt to conceive again in the next few months, but I am concerned about my weight. Is it really dangerous if I were to get pregnant at this weight?