Hi! I'm A 22 Year Old Female On Nexaplon And

Hi! I'm a 22 year old female on nexaplon and I've noticed some unsettling breast pain. While I took a pregnancy test (rule out the possibility), I found that nexaplon can cause false negatives. My test came out negative. While that would put at me at ease of doesn't. I've had a sudden lose of appetite (for about a week now), exhaustion (i fall asleep at the drop of a hat), pain in my lower abodomen ( hitting a 4 on a scale of 10), and now this new symptom. I'm starting to worry something is up. I'm not on any medication and only take Tylenol when I get headaches (less than twice a month.) Should I be worried or is it all in my head?