Toddler played with gas stove

So while I went to get my toddler his juice in his room he played with the gas stove and turned it on but not lit just let gas out. I didn’t smell it but I heard it and turned it off immediately then I opened windows and doors and put the kitchen fan on. (He never touches it because I always tell him that it’s hot not sure why he decided to play with it but now I do have to get safety covers) I’m 31 weeks pregnant and I might have smelled it a bit but I feel fine. My toddler feels fine as well my big mistake was not to leave the house I was opening windows and doors that I might have inhaled some. If I feel fine and baby is moving everything is fine right ? My toddler seems fine as well he is back to playing and I had him drink water and took him outside after. Should I be worried ?