stressing and bloated but worried. HELP!

So lately I've been really bloated and constipade but I can go to the bathroom but it's just forced and not the same. I feel so inflated and I always get scared because like I think to myself what if I can be pregnant? Last time I did something was like 2 weeks ago, we technically didn't have sex because he just insurted it 3 times and then I told him to stop and he did. He never finished and I asked him if he precame and he said no because we didn't do it for a long time. I wasn't worried but not I'm stressing like crazy because I'm super bloated and can't really go to the bathroom but those are the only symptoms. I was not fertile when that happened and today is the 3 days of me being fertile and my period will begin in 2 weeks in 3 days and I usually always tend to PMS really early but now I'm worrying because this was the FIRST time EVER him inserting it raw. Many of my friends say I am fine but I know I am but sometimes i just stress myself out and make myself scared. Is blotting normal? (PLEASE RESPOND STRESSING LIKE CRAZYY) also I am not on birth control.