Anyone else with this issue

My son just turned 3 months old but for the past few weeks he’s been lifting his head ALOT and his tummy at first I thought it was gas or tummy was hurting but he wants to get up and it’s so frustrating because I feel like he’s still too little he can hold his head up most of the time but obviously his arms and legs are still not strong enough but he cries and cries because he wants to sit up. When I hold him sitting up he moves so much like he wants to just do it on his own. Maybe I’m crazy but it hasn’t been fun anytime I lay him down after about 5 minutes he wants to get up. I can’t do much...I already couldn’t before but now it’s ahhhh. Anyone else with a similar situation?? What did you do or just anyone in general ....what to do???