Welcome to HCM.
Some changes do occur in the period and it is normal also. If you are sexually active, it is better to go for an urine pregnancy
test using th kit which is available in the drug store. Some times spotting do occur in early pregnancy, It is better to check it and if it is positive i advice you top see OBG specialist immediately.
Hope I have provided the information you needed.
Wish you good health. Take care.