How do you do user testing when you need a specific audience and can't afford expensive software?

Hi everyone, I'm a first time founder and I'm trying to do user testing on the prototype version of my venture's website. I'm bootstrapping and can't afford expensive software such as usertesting.com, but I need a specific audience: women in the US ages ~22 - 36 who are either trying to conceive OR pregnant OR who have given birth in the past 12 months. Are there alternatives to software such as usertesting.com (I've looked at competitors - userbrain, usabilityhub, etc. but they all seem to be similarly $$$)? I don't have many people in personal network that meet my criteria, and I feel like I've already made asks for feedback from the ones that do, so I'm looking for other options. Many thanks in advance for any advice or resources that might be helpful! Or if you meet this criteria and would be open to being a tester for me, please reach out :)