Acura Integra overheat since yesterday

1990 Acura Integra
204,722 mi
Automatic
2 wheel drive
No strange sounds
Maybe engine oil leak because I usually have to refill the oil after a long drive


Please help me I am a single mom on a tight budget and every penny I can save will be great, please understand that I am quite a novice at finding and fixing a car problem! Forgive me for the long explanation.

Yesterday I drove my kids for about 15 miles and noticed that it started to overheat. A little white smoke was coming out of my engine. So I pulled over. I realized that I did not have enough engine oil (it takes 10w-30 and I put in 10w-40 by accident) so I went to a local gas station and bought a quart and filled up the engine. I let the car cool down and started driving back home.

However the car started overheating almost immediately. So I had to stop and let the car cool down. I guess in my frustration of doing this a few times. I decided to take a chance and just drive back home. While I was driving back home the check engine light turned on and the gauge was all the way to the right indicating the engine was very hot.

So after coming home I didnt touch the car anymore and this morning the car still has the overheating problem. Can anyone help me please! Please remember I have very little knowledge about cars. Thank you in advance!

Oh I should add that prior to this happening I had just driven back which was about a 65+ mile drive. And my car burns up engine oil really fast so when I drive long distances I tend to have to refuel the engine oil.