WordPress keeps changing my password, cant login without using “lost password”

Every time I log out or try to login on a new device, www.ads-software.com says invalid password. I have manually gone into my account and changed the password just in case there is nefarious activity but it makes no difference. My site is hosted with GoDaddy. This all started when I attached my domain to my theme and published it. Before that, it was perfect with the generic domain. I need to have a static secure password that works across all devices and browsers. Please help, I am launching my new business in 3 weeks and this has to work!