Worried about health

IBS or....

Hello, I recently went through a very stressfull time (husband job loss and the aftermath of his mental state) which left me extrememe stressed and still slightly stressed. I had a couple days I did nto eat or drink much if anything. Last week was a decent week and i resumed my normal eating/drinking schedule as always. This week though i have been having pains in my lower abdomend and pressure. Nothing sever just bothersome. I have had IBS in the past due to extreme stress and it does feel similar but last time it was in my upper abdomen near my ribs, not anything at/bellow my belly button. Someowhat feels like period cramps in a way..but different. I took some medicine (miralax and gas pills) which somewhat help but the feeling is still there.

I have health anxiety so i try not to go crazy googling. I saw a video online though of a girl that had state 4 colon cancer in her 30's and her pain mimiced IBS and she had no idea. so now im super worreid about that. I am 31 and i keep telling myself to think logically that i just threw my entire system off by being so stressed that im having some digestive issues or maybe even inflimation. I just want to feel better and now worry about it!

Im switching life insurance so I have a CBC test for life insurance coming up in a week which they run it for a lot of things to make sure you arent already sick. Would that show if something is wrong with me like cancer? I just had a CBC done for my physical like 2/3 mo ago with my doctor but i had no IBS type symptoms then. Sorry for the long read, i would appriciate some guidance or if anyone has similar digestive issues.

Symptoms:
Twinges of pain at/around belly button
Twinges of right and left side of lower abdomen
heaviness/full feeling below belly button
some nauseau if im really focued on my issues
constipation but meds have seem to fix that (still having some discomfort)
some back pain

Thanks!