Has anyone’s toddler had back to back sickness and it NOT be anything serious?

Since starting nursery my daughter has had back to back sickness and I’m terrified she may have the c word. GP keeps fobbing us off saying it’s her first winter in nursery but this timeline is ridiculous!

15 Sep 2025- cough runny nose no fever

10 October 2025 - fever

10 Nov 2025- stomach bug

08 Dec 2025- fever runny nose

28 December - fever for 1 day

13 Jan - 16 Jan 2026- fever cough runny nose

20 Jan 2026 - fever ( 1 spike) cough - abx

29 Jan 2026 - fever cough runny nose (3-4 days)

08 Feb 2026 Stuffy / runny nose - no fever

16 Feb 2026 4 day Fever and runny nose (fever 40+ with rigours)

04 March fever

Has anyone had similar and it turn out to be nothing but normal immune system developing.?