Paranoid

So last week on Thursday I had to take my 4 month old son to the hospital. He hadn’t been eating right for about 3 day. Thursday morning he hadn’t pooped in over 24 hours and hadn’t peed it 6 hours. He was crying nonstop so I knew it was time to take him somewhere. When we got the hospital they gave him a baby enema and an IV with fluids. They even did an X-ray on his belly. Everything ended okay and he’s doing great now. But every time he gets a little fussy I get scared and paranoid that I’ll have to take him back. I love him so much and it hurt to see him hurt. Any advice on how to get over being so scared? Or am I going to be like this from now on?