Feeling lost in life

Hello. I am a new grad. I completed a year of clinicals and obtained a part time job at the same hospital. I was miserable as a student. The environment of the hospital is terrible, the staff is terrible, working holiday/weekend/call do not fit my lifestyle. I am a single parent. I have a previous career that I have worked since before I went to college for ultrasound. I worked that career all the way through clinicals and I work it part time as well as being a sonographer at a hospital. There are no other out patient clinics or offices that offer ultrasound in my area or surrounding. It’s my only choice to work at the place i work now. I realized during clinic that I was unhappy. I still took the job offer but I am still unhappy only working a couple days a week. I do not mind scanning but I don’t love it. I don’t know if I will regret leaving the career all together or if I should just stick it out. My heart tells me to quit and just do my other job that I love. but it isn’t as secure because it depends on the public. I went to school for the job i love before I went to ultrasound school. i was 20 when i decided to go for ultrasound. I didn’t realize how much i loved my job and hated ultrasound until i was already in my final year of clinicals. I’m afraid to have wasted 4 years of my life and tuition. What if i want to do ultrasound in 10 years down the road? I won’t have my CME’s if I’m not working and I won’t have experience. I would basically have to start over again if i ever did. It’s not like a regular degree like business or teaching that you can always refer back to and carry under your belt. (unless i’m wrong and it is possible?) I am purely only in ultrasound for the money but my mental health is very detrimental here and I am afraid for financial reasons and the fear of regret and making the wrong decision out of emotions. I am 24 years old.