Guyssss I need your HELP/ADVICE/TIPS 😢

Soooo I’ve always had a regular cycle for the most part. However this month things got a little... weird. So about a week before my cycle was supposed to start, I noticed some spotting. I ignored it. About a day or two when it was supposed to start I noticed some spotting again. I ignored it. On the day when my cycle was supposed to start I noticed it didn’t. So on day 3 of being late I got worried and took a pregnancy test and it came back negative. On the 6th day of being late, it finally came. Now things still remained a little weird because my period is wayyyy lighter than it usually was. Light to the point where I can get away with wearing a panty liner for a few hours. Adding to that, I am also cramping less and noticed I have a new symptom of lower back pain.

What do you think is happening? Is it anything to be worried about? Should I go see a doctor? Has this ever happened to you?

I just want a sense of peace of mind. 😢

Thanks lovies