You can find many other questions on this site about timing your payments vis-a-vis your credit score (e.g., here, here, and here). Basically, your credit usage is reported at a particular time unknown to you. If you routinely have a lot of credit used up (as for instance spending 50% of your limit every week), you increase the odds that that high usage will be reported.
The exact manner in which your credit utilization affects your credit score is not public information. However, as you can see on some of those other answers, it doesn't seem that using 50% of your available credit should be so terrible for your score. Thus, if your score is bad, there may be other reasons. You might want to check out a site like CreditKarma to see what they think is impacting your score.
More generally, it's somewhat worrisome that you're spending more than your credit limit every month. That suggests that if some emergency arose you might not be able to handle all the relevant expenses. (Unless, that is, you have plenty of money and are just using the credit for rewards and/or convenience; but in that case it should be relatively easy for you to cut down your credit usage, or get your limits increased.)