It is normal to have questions about any new treatment or vaccine. However, COVID-19 vaccines have gone through the same cycle of clinical trials and independent reviews as every other vaccine or medication. They were able to go through the cycle and be produced more quickly because of help from the U.S. government, but quality was not compromised.
Additionally, the vaccine uses modified RNA, which has been around for more than 10 years and has already been used as a treatment for cancer. This is not a completely new type of technology, which is one of the reasons that pharmaceutical companies were able to develop the vaccines quickly.