There are, in my view, a lot of different factors at work here.
Firstly it depends what sort of relationship you want. If you are just after a fun flirty relationship with some sex which is really casual, then I don't think the guy-not-texting thing is an issue. It's just casual, you can't expect them to text you IMHO.
However if you are wanting something more traditional and structured it is different.
I wonder if you are picking the right sort of men, or at least, the sort of men you actually want to be with. I'd be pretty hacked off if a man I was in a properly romantic relationship with didn't get in touch with me after we'd had sex. Mind you, I'd not worry about sending the first text either, just go for it!
Maybe you need to take things a bit more slowly and get into a proper relationship, one where it is expected that you will be together and be in regular contact, before you sleep with the guy?
I appreciate that in this modern age of Tinder, people expect you to get into bed at the drop of a hat, but I still believe that you can hold out for more.