Help!

So, uhh... this is really weird for me, and I’ve never told anyone about this, but yea, I master bate, and I don’t want to tell anyone bc I don’t want them to judge me. But last night, I was fingering myself, and I, well I went in, and it felt... well I didn’t really feel anything, but when I rub my clit, it feels so good, but this morning, at 3:44 am! I woke up in a lot of pain, but I’m my lower stomach, I told my sister about the pain, not the masterbation and she said it might have been a cramp. I’m worried I did something wrong. Also where is your “g-spot?” And another thing, I’ve tried the shower head, fingering, a vibrating brush, humping a pillow, and i just want to do something different. (I’m 14 almost 15, and I can’t buy a dildo, even though I REALLY want to). Any suggestions?