My son is about to be 3 months old and at his 2 month appointment he already weighed 13lbs. He's at this point now where in his infant car seat I get blisters when carrying! I've tried the crook of my arm, and the way the handle is .. I just can't handle it! It cuts off my circulation so fast I can only bare it for about 4 seconds . Do you think I should go ahead and get one of those rear facing convertible seats?? I don't mind getting him in and out every time - my hands are on fire!!