I totally understand wanting to look good, especially with all the skin changes happening right now. But please skip the bleach for now, it's not worth the constant worry and anxiety about chemical exposure.
After my past loss, I became extremely cautious about everything I put on my skin. I would strongly suggest avoiding bleach completely, as those chemicals are quite strong and it's better to be safe.
Bleach contains chemicals like ammonia which can get absorbed through the skin. My dermatologist and gynac both advised me to strictly avoid chemical bleach during pregnancy and opt for natural facials instead.
With my thyroid issues, my skin was already super sensitive during pregnancy. It's best to avoid harsh chemicals like bleach and just consult your doctor before using any new beauty products.