Embaring question....need honest & serious advice only!!!?

I'm almost 12 weeks pregnant and my drive has skyrocketed. My husband is scared to have because he is afraid he will hurt the baby. So I have been taking matters into my own hands, but, I've noticed afterwards that my l area throbs for the longest time (sometimes hours after) even though I don't do any . Is that normal? Has anyone else ever experienced that before? Also, I've noticed sometimes I'll get little twinging feelings in my l area. Is that okay? Finally, sometimes I feel that I can't stop after doing it once, I have to keep going on and on. Is that okay to have a lot of s like that when you are pregnant??