I can feel you mate, not just in sports betting, there are days that I will also be in a losing streak in slot games or worst roulette games. So I will just stop for like 3-4 days, just doing sports betting at the side and not using big money until I get that confidence back. And this is just for me though, let's see I have a losing streak on roulette, I will just rest for a couple of days, and when I come back, I will win big, not enough to cover my previous losses though, but still it makes me feel good to be back on a winning attitude.
So that's it for me, just take a break, but still go and bet on sports. Perhaps you might want to switch though like playing slots and see how it goes for you? Just to change the environment and then be back and motivated again on sports betting.