Aunt Flo with my Grandma?

My grandma died two summers ago from complications with cancer. She wasn't very old...she was only like 67. Her and I were really close, and we talked about almost everything, except for..."personal stuff". By that, I mean we never talked about my period or anything like that. I got it when I was 12, and she died when I was 14. She was at my house this one day when I was having my period and it was really heavy. I was pretty much going to the bathroom every 2 hours on the hour to change my pad or tampon. I was paranoid about the whole TSS thing back then. The trash can is right under our toilet paper dispenser, and so when ever you go to get toilet paper off the roll, there's a pretty good chance that you can see the trash can and what's in it. So I think she probably saw the wrappers from my pads and tampons in the trash can. And there were a couple of times where I was like "What time is it?" and she would tell me, and then I would say that I had to go to the bathroom. And I had horrible, horrible cramps that day, and spent a lot of time lying around and holding my tummy. It seemed to me that she was pretty sympathetic towards me that day. Like, she was extra nice. DO you think that she knew I was on my period but just didn't want to bring it up? Back then, I was just really embarred to talk about my period with anybody...not even my friends. I didn't want to say anything to her about it, but I just feel like I kinda let her down by not wanting to share that personal part of my life with her. Do you think she minded that I didn't want to talk about it? Do you think she knew I had my period?? I just feel guilty about this whole thing. Like I should have talked to her about it or something.