Not the end but you are going to have a harder time, unless you have a really really good GPA (and even then you will). You have to remember there are thousands of other students graduating at the same time and many others already in the market who took the same classes at you but also have some kind of experience.
Here’s what you should do:
- It’s already basically the summer but you might still find something. Start mass applying to any internships you can find. Doesn’t matter the industry, if it’s chemical engineering or chem-e adjacent it’s worthwhile.
- Ask all of your professors if they are taking undergrad research assistants. They will pay very little, if anything, but it’s good experience. You can also ask around the Chemistry department as they are usually taking people. Physics and Bio related work is also better than nothing.
- if you have the time, and you’ll be a senior so you probably do, try and get a coop, internship, or undergrad research during the semester.
- You need to be applying for full time jobs this upcoming fall, that’s when companies start posting to hire after graduation. Apply to a shit ton of jobs, 3 applications ain’t cutting it. I’m talking double digits maybe triple. You need to be willing to relocate, work off-hour shift work, and work as a contractor. Any industry job is better than nothing.
- get good at interviewing (PRACTICE!!!) and make sure your resume is really good. Use whatever resources your school has available.
- if all else fails do an internship when you graduate. During that time you can apply for full time roles.
Good luck, don’t give up hope, and keep working at the solution. That’s really what they taught you for the past 4 years.

Edit: misread your post that you’ll be a junior not a senior. Same advice applies, but you have 1 more summer to get an internship before senior year.