are your source properties the same as the ones you were using before the issue appeared?
yes
Have your sequence settings changed or are you using different effects or different export settings?
im a beginner editor so yes i use more and more effects as i get better but i don't think there was enough to cause any problems in the new exports. Export settings are the exact same as when the exports were very fast.
Have you installed any new softwrae on your system or added any virus protection that might be causing issues with writing data to disk?
I have not installed any virus protection or any software(other than a large video game) that could be causing issues with writing data to disk. I have an ssd and an hdd. I put the same .mp4 onto each hard drive, then tried to export a couple seconds to test if it was one of the hard drives. Still had the problem.
"Make sure your sequence settings for previews match your export format"
I'm not sure what this means. My timeline has a red bar above the sequence though so I haven't rendered previews.
So after you told me to check previews, I went and checked/unchecked every export setting one by one and found out that the problem was that I continued to add more and more effects every video, while keeping "Maximum Render Qaulity and VBR 2 Pass" both on. Without them, the estimated time remaining shows and it is much faster. If there is anything else you know that could help me speed up render times, I would appreciate it.
Sorry for the late response, I thought I had "email me replies" checked. I appreciate the answer!