25 weeks, 1 day with sharp pelvic pain

This is my first pregnancy and I am 25 weeks and 1 day today. The past couple of weeks I have felt sharp pains in my tail bone, which I assumed was because my baby is sitting low and the added weight is causing that pain and pressure. All of a sudden in the middle of the night last night, I have begin feeling that same dull ache and sharp pain in my pelvic area. Almost as if she is sitting right there and ready to come out. I have felt a non-stop dull ache in my groin/ pelvic area but also get shooting pains into my inner thigh (where it meets my pelvic area) when I move. Should I be concerned??? Or is this normal? I know she is sitting low because I feel and see her movement below my belly button and into my pubic area. I don't know if I should be concerned because she shouldn't be in this low position this early or if I shouldn't be concerned because it's just the added weight that's pulling on my ligaments. Has anyone else experienced this??? What are your thoughts? Or advice??