Synthroid and atenolol

I have been on Levothyroxene for 14 months now. I have been experiencing nightmares, a "butterfly" feeling between my chest and stomach, itchy skin, dizziness, and am still fatigued. My dose is 50mcg. once a day. that was upped from 25 mcg. a day as my TSH level was not within the normal range. Sometimes I feel like I'm feeling WORSE after being put on Levothyroxene. I also am still gaining weight and am constantly bloated, having bouts of diarrhea, and my blood pressure won't stay regulated. I am currently recuperating from a bad cold and the cough is hanging on. My other meds I take are Atenolol-12.5 mg. once a day and Xanax-.25 mg. two to three times a day. Is there an interaction between all these meds(I take them at different intervals thruout the day to avoid interactions)?