nexplanon and back pain

i’ve been on nexplanon for 5 years (currently in my second rod) and i’ve just recently been sexually active. last week we had sex and he finished inside me. now i’ve been having a lot of back pain. it’s like i’m super stiff all the time.

i’ve also had some cramping, some bloating, no nausea, no sore breasts.

should i be worried at all? i know these are normal nexplanon side affects but i’m still a lil nervous so i’m posting this!