Hi @frustated2025. I may have missed prior posts so hope this is helpful and received in the kind light intended.
My ER doctors, personal healthcare system, and covid pulmonologist I worked for who treated patients worldwide, shared the following current view of many vaccine journeys and actual covid cases-

Each person has different medical body make up affecting body function and multitude of responses which is further impacted by past medical history conditions. Therefore its critical each person seeks their physicians advice and with their own independent research make the best informed vaccine choice for themself or loved one.
For covid testing,
unfortunately timing of it, actual type of testing, etc can create a negative result when actually had covid.
Then add that many people can be without symptoms, have covid, not wearing mask, so further unknown exposures occur.
Covid itself is everchanging thus the vaccines are modified to meet that particular strain, with not everyone having the same strain at the same time, vaccine evolution is necessary.

Thus the above is very complicated and consideration not just for oneself but everyone, such as my eight year old granddaughter going on 4th yr post covid, is crucial as I believe so many here can attest to.
Wishing you the quickest healing journey!🌈