I just used the neilmed and I have blocked sinuses and used it and it made it worse then I went on this site and it said not to use if yours sinuses a

I do not think that you have done any damage. You can try over the counter nasal decongestants. Please ask your pharmacist for this. Do not use antihistamines. When you are congested, you can try double strength. It means, you can use two blue packets for the 8 oz of water.