Stomach and back aching,In pain

Hi I wondered if anyone can help me or give me advice please! I hadn't had a period for two months but still getting the achy stomach which now and then made me feel sick.I am now this month just getting a slight sign of a period nothing hardly,still the stomach ache but my back is killing me I feel like all of my insides ache really bad. Is it worth going to my doctor? Xx

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