Hubands anxiety spike?

Basically about a month and some ago me and my husband were walking to work and we walk this long bridge. We had no idea there was a tornado warning and rain smacked us crazy suddenly as well air. It was so hard from all direction.

Suddenly i tell my husband lets turn back home and he suddenly tells me he can't breathe and he's panicking. I tell him to look at me and breathe in and out. It helped him and we got off that horrendous bridge. He said he felt like he was choking like he was drowning

After that he suddenly has horrifying anxiety of that bridge and we go a different slightly longer way to work now. He doesnt understand why he can't do it because he says he knows hes fine but his body says otherwise. Ive told him its just because it was traumatic for him and experiences like that can cause that anxiety.

Since then he feels anxiety just leaving the house and even a strong breeze. He says obviously he still forces himself but lately he complains of shortness of breath and he has random panics attacks now even at work since then.

His brother and wife has also been staying with us and i hate them (they legit freeload and ate all our food) and thats been causing him a lot of stress since we're stuck in our small room. Him, me and our 6 month old and we gave them the living room (its a one bedroom)

He has started to freak himself out thinking hes got heart problems because when he panics his heart starts racing and he feels like his heart is gonna explode. I tell him anxiety can do that (we both have suffered social anxiety throughout our lives) but these days hes always thinking something is wrong with him. Im positive hes fine but i still tell him if it'll settle his mind we can go to the doctors. He wanted me to post this on here to find out if anyone has any insight to what he's going through.