Please reply . Do I need to see a doctor :(((

So the past year and half have been very stressful. I convinced myself I couldn’t have kids because I had Infection twice for a long time.

I have had everything checked and everything is fine there’s no damage from the infection but I still can’t come to terms with it I’m still worrying and stressing overthinking every night.

I’ve lost so much weight gone from a size 10/12 to a size 6 which is even too big and I’ve lost it unhealthily. I eat once a day and complain when I do, I count calories and obsess/ worry think I’m putting weight on..

If there’s something wrong little I overthink it for hours and panic myself I haven’t had a decent night sleep in 5 weeks my partner says I need to see a doc about my mental state but I don’t see why he would say this. I’m only 19 so sick of everything 😩