Things that happens after losing your virginity

Hello everyone! - I would appreciate it a lot if you could come with some views and thoughts about my problem. - ** Just to let you know before you judge. I am old enough to have sex. But I don't have a lot experience so that's why I would like to get some advice. ** So I lost my virginity 31st of May. The day right after I felt sick — nausea, headache and I cough a lot, almost like a cold(?). We did used condom, so it was protected and he came very little into me. I didn't think he cum, but since I don't have a lot experience I'm not 100 % sure about that and I don't think that the condom broke. Also right after we had sex I spotted for very long time, a week or so. I've noticed that my stomach seems bloated. Normally I'm very slim about my stomach area, but currently it's just bloated. My pms has always been very irregular so I don't know when it should come. Sometimes there will be more than 2 months apart from each cycle and other times less. So far it haven't come. I wonder if I could be pregnant? I'm not on birth control and I didn't take the morning pill. Are all these symptomps normal? - Every day since I lost my virginity I thought about if I could be pregnant and I keep wonder. I think that I might be stressed out as well since I'm currently very busy. Not sure if any of that could affect me aswell -