Do you mind if I ask why you're not willing to wear just comfy clothes to work out? I'm currently the same size you are and big tee and yoga pants or sweats are what I wear to the gym. I've never noticed anyone looking at me while working out and it's actually pretty common clothing for the gym (from what I've seen) and I use a nice gym (well, when I go). For me (and obviously I cannot speak for how anyone else feels), I can work out a lot longer and feel a lot better about myself if I'm comfortable and focused on me. I also think that if people do notice me at the gym they're thinking "good for her" and not anything negative. May not be helpful at all, but I thought I'd throw it out there.
Re: Help with Plus Size Gym Clothes