Suggest Remedy For Late And Scanty Periods

hi

iam 31 year old woman

got married 2 years back and we are now trying for a baby

but i have a slight anxiety, for the last few months- iam having slightly late and scanty periods, have extreme fatigue and knee pain in the middle of cycle, feel sleepy.could there be a problem with me because this time iam feeling extreme exhaustion along with lower back pain, slight nausea and drowsiness