Hey ladies! I would love some insight. Since about 3 dpo I have been experiencing slight cramps (pretty normal for me) but yesterday and today I have also developed minor low back pain off and on and felt a sharp painful sensation in my lower abdomen while working out pretty vigorously. Once my heart rate comes down the pain goes away almost immediately. I am a fitness instructor so I'm used to the types of exercises I was performing and I do them often. Could these be early pregnancy symptoms? Should I be concerned?