Can anti biotics screw up things ?

I'm on anti biotics for the next 2 weeks for a cold, but I was planning on starting an aas cycle this week. I am currently on hgh (4 iu's ed)


2 questions

1-will it affect my cycle?
2- I've notice that when I start a cycle I often get a little sick soon after ( I guess from the stress on the system ). If I wait till I'm finish the anti biotics my emmune system might be weaker and make things worst. This kind of makes me think I should start during the time I'm taking anti biotics

which antibiotics?

some can make you feel weak but it shouldn't 'screw up' your cycle

they're called biaxin xl 500 mg, 2 a day for 2 weeks !!!
Thanks

Ive taken antibiotics on a cycle before with no problems.