Left birth control in glove compartment of car overnight and took it out late this morning. will effectiveness be altered? it was 84 degrees outside

Probably OK...: Most contraceptive pills ask that you do not store them in temperatures over 77 degrees. Hormones can denature at high temperatures; however, A single, short exposure to 84 degrees isn't likely to keep them from working. I wouldn't make a habit of this. Your pill should come with a package insert that gives the storage temperature recommendations. If worried get a new pill pack. Best wishes!