Sex while pregnant

Normal po ba makaramdam ng paninigas ng puson or tyan during and after sex while pregnant po.? I'm on my 23rd week of my pregnancy and we're still doing it since hindi pa naman sya ganon kalaki and so far sa mga nababasa ko na article, 7mos pa ang hindi na okay for sex. But last night po kasi, after sex, nakaramdam ako ng paninigas at pananakit ng puson. At first sobra sakit pero after few minutes nabawasan naman yun pain. Then hanggang sa feeling na lang na parang nagpigil ako ng ihi. Is it normal lang po ba.? Or is it also because of the position that we made.? Thank you in advance sa sasagot.. #advicepls #pleasehelp