It's been almost 4 years sense my last pregnancy and I feel like I dont know anything anymore. Quick…

It's been almost 4 years sense my last pregnancy and I feel like I dont know anything anymore. Quick question ladies, does round ligament stretching make your bellybutton feel like it's gonna rip open? I've been having losts of pain in my sides and upper abdomen but the belly button hurts the most. I'm 20 weeks today and baby likes to sit high or on my left side. It gives me contractions sometimes and I just get really uncomfortable.