Steroids first trimester

I am due to get my period Saturday but I’m praying I’m not pregnant! I have had a horrible cough for 4 weeks and finally went to the doctor today - asthmatic bronchitis. I NEEDED a steroid injection - I am short of breath. She is also starting amoxicillin. I am having severe anxiety now that if I am pregnant I just messed things up right from the start but breathing is kinda important! Anyone have an injection of solu Medrol in the first trimester?