I have chf and i have bad allergies. if my sinuses drain bad can this cause me to have chf again? i didn't know if this would cause a problem or not.

Likely no/depends,,: If I take CHF to mean Congestive Heart Failure, then it's likely not to result from non-draining sinuses from allergy as it's not related. If anything, the heart failure might cause fluid in the lungs and mouth, and difficulty breathing, but not if it isn't advanced or badly managed. Sinuses can be congested by the bad allergies themselves and that's likely why they don't drain.