My credit Score

Recently, a few months ago, I got a couple loans and a credit card, all of which I have made on time payments to and paid even more than the minimum. I wanted to raise my credit score so that I can purchase a new home for me and my children. My credit score to begin was a 549. It increased over the months to a 602. I had revolving points. Well, out of nowhere,, my credit score dropped a whopping 💯 points to 502 and began to decrease from there. I really feel like someone is playing tricks on me. I am so upset about my credit score! Can someone whose with Intuit help me out !!?
~Pearl