I have stage 3 lung cancer was diagnosed last August

I had no sign or symptoms prior . Then woke up to my eye twitching on lasted a minute or so . Happened one more time so I went to ER. Took some test then when getting ready for CT I had twitching of the eye again and the nurse put me in s bed and started me on seizure meds. I was immediately taken for CT . In an hour or so I had a brain surgeon and oncologist at my bed . Surgeon said I had a tumor on the right side in my brain that had traveled from my lung . Oncolologist told me I had lung cancer . Surgeon said had to be removed the next morning and that I was lucky I only had two small seizures . That I could have had a massive seizure and would may have to learn how to talk walk again . So I had surgery the tumor was close to the outer brain they said the rest of the brain showed no cancer. I was out on steroids for inflamation and was out of ICU after one evening and wasn't incubated after surgery . About one month of recovering from brain surgery I started 6 treatments of a very strong Chemo and also another plus keytruda. I had a Ct after 3rd treatment and tumor shrunk and shrunk again after the 6 th treatment . I was then taken off the strongest Chemo they said that Chemo would not do anymore after the 6 treatment . So no I'm on 1 Chemo and keytruda with one y last treatment tomorrow for now because Dr wants a CT in 2 weeks or so to see where we stand. I forgot to mention that they found a small amount also spread to my clavicle bone and tats why I was diagnose as stage 3 . Also had a small dose of radiation to my brain in the beginning and have had 2 MRI since then they both showed no sign of anything growing in the brain . Scheduled for another MRI for brain end of August. I'm so scared to have the next CT in two weeks . I can't stop thinking what it will show and what the next step will be for me. Ugh Sorry such a long text.