sick from gear???

[vinndog8]

this is my 8th or 9th cycle. I am 33 and weigh about 225lbs. been lifting for about 16 years. I am doing 650 mg of test 400 every 7 days and 500 mg of deca every 7 as weel. I am also throwing in 35 - 40 mgs of dianabol e/day. Ive been on for seven weeks and two to three of those weeks, ive been sick with cold and bronchial infection. was on z pack for a week and it went away. but then came back week later . now my doctor put me on a stronger antibiotic cuz infection is back . is it my gear that is weakening my immunity ? I dont want to stop but dont want to get sick again when these antibiotics are finished . what does anyone think??