Am taking atacand and my thyroid levels went from 2.7 to 14.6 in three monthes. Also taking .75?

I'm not an expert so I'm going to answer based on personal experience. My answer assumes that you'd previously been taking Synthroid and that your dosage did not change:

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It's certainly possible though it's more likely an indirect reaction to changes in your calcium or other levels rather than a direct interraction. There are so many things that can effect your thyroid levels that you need to be cautious and consider all recent changes. Though, your level shot up so drastically that a drug interraction, whether direct or indirect, certainly looks suspicious.
The only way to know for sure is to do a trial. The trial needs to be at least 4-12 weeks in duration. First, test your thyroid level. Next, with your doctor's approval, either discontinue or switch to another blood pressure medicine. Finally, test your level again. (Ideally, you would test your thyroid levels every 2 weeks during the "trial period".) Keep in mind that some of the factors that initially influenced your thyroid may have spiked or fallen quickly but can take much longer to return to normal, even after the offending medicine was removed... Basically, the longer the trial the better.
If in doubt, your local pharmacist is always an excellent source of information.
Good luck!