Latex free mamas, or those with latex free kids

[Squig'sMumMum]

I need help so I just don't panic here...
My latex allergy is getting worse apparently, as Monday I got a rash from my bra strap, which I had never been sensitive to before, and I also reacted to my underwear.
To fix this I ordered new nursing bras from Leading Lady (latex free) and went and bought some new underwear from Hanes where the elastic is 100% covered. It does contain 5% spandex, but I am wearing it now and it hasn't caused any rash... I can't afford $20+/pair for latex free underwear (if you know of cheap latex free panties, please let me know!).

The issue is my DH and DDs. DD1 shows no sensitivity and so I have bought her normal panties, and my husband has boxers with the elastic around the top. I think touching this may be part of what is increasing my sensitivity... I know they make boxers where it is covered and plan to get them for DH. Do they make kids underwear where the elastic is covered? This is important not just for me touching them in the laundry, but also because DD2 IS showing sensitivity She is going to be 3 months old and already she has gotten a rash on her head from a headband (with upon inspection was exposed elastic that looked like lace STUPID MOMMY! ) and on her legs from outfits with elastic exposed on the legs and now last night I put her in a disposable we had sitting around, not thinking, and OF COURSE they have elastic and she got a rash around her legs. (Total duh moment, I already realized she was sensitive and was keep elastic away from her, I just totally forgot about disposables having elastic) How am I ever going to find underwear for her? And every outfit it going to have to be checked for exposed elastic.

I am totally trying not to have a panic attack here.