Welcome and thanks for posting your query to HCM.
After reading your query the best possibility of the swollen ingunial lymph
nodes appears to be trauma only. Injuries and trauma to the legs, groin area or the foot can affect the lymph nodes at inguinal area and among these injuries too, injury
to the genital/groin area is the most common cause of inguinal nodes swelling. As the injury starts to heal, you will find a significant decrease in the swelling of the lymph nodes as well. However, its almost one week since the injury and the swelling is not subsiding so it is better to see a doctor.
Now regarding STD's --as you are quite sure that both of you were the first for each other so this possibility is unlikely. Along with it their are certain local and systemic symptoms present in STD's which are not mentioned so we assume to be negative for STD's as a whole.
Lastly to differentiate your inguinal swelling from hernia
, a simple guide is that in hernia the swelling keeps on increasing and decreasing with different period of time in day which is not possible in inguinal nodes swelling, so can make out accordingly.
Lastly the point of advice is to stop weight lifting for a short time and to see doctor who can guide you the best as it is almost one week of your swelling.
Hope this information will help you.
with best wishes for your health,
Dr Sanjay K Kanodia
MD ( Dermatology and STD/ Venereology)