It has only been near the final end of this year's Ramadan that I have received a sign from Allah to repent for all my sins. Recently, I have started to become a good Muslim and I pray daily 5 times(or as much as I can depending on my school/work schedule). I have felt a lot of signs that the Yawm Al-Qiyamah is approaching rapidly and I feel guilty for my past sins. I often cry or have tears in my eyes when reading about Islam or when I'm praying or doing duah. I am trying hard to be a good Muslim. What bothers me today is that I have missed the last Ramadan, and I am wondering if I can fast for a month because I haven't in July-August. Can anyone answer this question?

Thank you.