Will I get in any trouble on my F1 visa if I did not attend my classes 3 to 4 times for each subject?

I do not know the answer to your question, but note this, if you fail to carry the normal course load, without explanation, your school may report this to CIS. You must inquire if the classes you missed are sufficient to course you to make the course load But if you are unable to meet the minimal course load for reasons beyond your control, you must quickly inform the director of international student affairs in your school. Failing to attend classes without explanation may get you into trouble.

As long as your school official doesn't terminate your status and reports you to USCIS, you should not have any problems with immigration. You may, however, get disciplined by the school.