Thank you both so much for your replies. After I didn't get any replies for a while, I decided to turn the fan back on and just let it be. I have also since added two intake vents (I was waiting for the screens to come because I had to measure before cutting). Everything is doing nicely now. I think the problem was, I changed the environment too quickly because once I re-sowed the seeds and cut back all the wilted leaves everything is growing wonderfully.
I have a pushsensor in the greenhouse and once I added the exhaust (even before adding the intake vents) my temps were tolerable. I could see an obvious average temp difference compared to before adding exhaust. The seams do not come together well at all so I figured before it started getting too hot, no intake would probably be ok. (I researched if negative air pressure would negatively effect and I didn't find that it would) But now that its getting a bit hotter I have even added a high output fan to the outside of the greenhouse to move the hot air sitting around it, so that the exhaust would be able to pull in cooler air as well...since one of the intake vents is right by a light.
Again, I really thank you both for taking the time to help me out because I was truly at a loss, I made my adjustments and threw my hands up in the air..."if I had to eat only what I grew, I would starve" lol
Let me know if you have any additional pointers....
