I feel like I’m not a real mom

I’m 22 and have a 4 year old son. the first two years of my sons life we lived with my sons dad, but he worked a lot so it was basically just me and my son all the time. I felt like a real mom, I took care of him all by myself. I moved out when he was two because his dad became very abusive. I live with my parents now and I don’t feel like a real mom anymore. I still take care of him all by myself all day while my mom is at work, my dad is on disability so he’s always home and sometimes my son will play with him for a little bit. Then when my mom gets home she plays with my son for a little bit too. They help me so much which I appreciate more than anything and I tell them that all the time. But it just makes me feel like I’m not a real mom, I feel like real moms don’t have this much help and idk. I miss when it was just me and him sometimes but I don’t think I’ll be able to afford to move out for a long time, at least until he’s in school and I can get a mostly full time job, which will make me have less time with him. I sometimes just want to go back to when it was just me and him all day. I’ll never get the time back that I could’ve spent more time with just me and him if my ex hadn’t become abusive. And I’m not saying this is anything my parents have done wrong to make me feel this way, my son just loves them both so much that sometimes I feel like my mom is more of a mom than I am. She knows more about being a mom then I do, she knows all the answers she knows how to be a parent and I still don’t. Is it normal to feel this way

Edit- trust me I know I’m incredibly lucky to have a support system, they were still there for me back then when I didn’t live at home and my son still spent time with them. I just felt more I guess.. accomplished when I didn’t ALWAYS have someone to lean on. like when I didn’t have someone to lean on it made me have more drive to figure things out for myself and learn. but thank you for your responses it helps