A childhood belief about periods

At 10, we had the "period and puberty" talk from a health visitor at school. She was quite an old person and told us lots of things wrong. Like she said sanitary towels were the only option and there was nothing else we could use so we couldnt do any sport or go swimming during our period. And that we were never allowed to tell the lads in our class anything that she told us. I ended up with a lot of false information after that,