29 weeks 4 days, mild cramping

So, I'm almost 30 weeks preggers and I have noticed some mild cramping in my girl part. A few times thru the week I felt a bit of Pressure here and there, but it doesn't last long. Baby is moving and kicking good. Not really doing a whole lot been taking it easy mostly. Not high risk and passed all my tests. Taking flagyl for bv and taking my prenatal. My doctor has me taking 400 mg of magnesium daily due to leg cramps I been having. I don't know why I feel crampy. It comes and goes and is tolerable just feels a little noticeable at times. I'm not too concerned, but it never hurts to ask ppl and gain knowledge just in case... hopefully just me being paranoid bc she's coming soon. Thanks ☺